[tests] enable sqlite-net-pcl test in .NET 6 (#5366)

Fixes: #5319

Context: ericsink/SQLitePCL.raw#383

This test was originally failing in 6e3e383 with:

	android.runtime.JavaProxyThrowable: System.TypeInitializationException: The type initializer for 'SQLite.SQLiteConnection' threw an exception.
	---> System.DllNotFoundException: e_sqlite3
	    at System.Runtime.InteropServices.NativeLibrary.LoadLibraryByName(String libraryName, Assembly assembly, Nullable`1 searchPath, Boolean throwOnError)
	    at System.Runtime.InteropServices.NativeLibrary.Load(String libraryName, Assembly assembly, Nullable`1 searchPath)
	    at SQLitePCL.NativeLibrary.Load(String libraryName, Assembly assy, Int32 flags)
	    at SQLitePCL.Batteries_V2.MakeDynamic(String name, Int32 flags)
	    at SQLitePCL.Batteries_V2.DoDynamic_cdecl(String name, Int32 flags)
	    at SQLitePCL.Batteries_V2.Init()
	    at SQLite.SQLiteConnection..cctor()

The problem being one of the transitive dependencies of
`sqlite-net-pcl`: [`SQLitePCLRaw.bundle_green`][0].

`SQLitePCLRaw.bundle_green` pulls in even more packages:

	.NETCoreApp 3.1
	    SQLitePCLRaw.core (>= 2.0.4)
	    SQLitePCLRaw.lib.e_sqlite3 (>= 2.0.4)
	    SQLitePCLRaw.provider.dynamic_cdecl (>= 2.0.4)
	MonoAndroid 8.0
	    SQLitePCLRaw.core (>= 2.0.4)
	    SQLitePCLRaw.lib.e_sqlite3.android (>= 2.0.4)
	    SQLitePCLRaw.provider.e_sqlite3 (>= 2.0.4)

`SQLitePCLRaw.lib.e_sqlite3.android` contains the `libe_sqlite3.so`
native library for Android.  In .NET 6, NuGet is preferring the
`.NETCoreApp 3.1` packages over the `MonoAndroid 8.0` ones.
This means that the `MonoAndroid 8.0` package contents aren't
included in the `.apk`, resulting in the `DllNotFoundException`.

To manually workaround the problem we can add an explicit
`@(PackageReference)` to [`SQLitePCLRaw.lib.e_sqlite3.android`][1]
into the Android head project:

	<PackageReference Include="SQLitePCLRaw.lib.e_sqlite3.android" Version="2.0.4" />

Then the test works as expected.

[Eventually, `SQLitePCLRaw.bundle_green` will need to include][2]
dependencies for .NET 6, such as:

	net6.0-android
	    SQLitePCLRaw.core (>= 2.0.4)
	    SQLitePCLRaw.lib.e_sqlite3.android (>= 2.0.4)
	    SQLitePCLRaw.provider.e_sqlite3 (>= 2.0.4)
	net6.0-ios
	    SQLitePCLRaw.core (>= 2.0.4)
	    SQLitePCLRaw.provider.dynamic_cdecl (>= 2.0.4)

This will solve the problem for customers going forward.

[0]: https://www.nuget.org/packages/SQLitePCLRaw.bundle_green/
[1]: https://www.nuget.org/packages/SQLitePCLRaw.lib.e_sqlite3.android/
[2]: ericsink/SQLitePCL.raw#383

Author: jonathanpeppers

tests/MSBuildDeviceIntegration/Resources/LinkDescTest/MainActivityReplacement.cs

@@ -116,9 +116,7 @@ protected override void OnCreate(Bundle bundle)
 			Android.Util.Log.Info(TAG, cldt.TryAccessNonXmlPreservedMethodOfLinkerModeFullClass());
 			Android.Util.Log.Info(TAG, LinkTestLib.Bug21578.MulticastOption_ShouldNotBeStripped());
 			Android.Util.Log.Info(TAG, LinkTestLib.Bug21578.MulticastOption_ShouldNotBeStripped2());
-#if !NET
 			Android.Util.Log.Info(TAG, LinkTestLib.Bug35195.AttemptCreateTable());
-#endif
 			Android.Util.Log.Info(TAG, LinkTestLib.Bug36250.SerializeSearchRequestWithDictionary());
 
 			Android.Util.Log.Info(TAG, "All regression tests completed.");

tests/MSBuildDeviceIntegration/Tests/InstallAndRunTests.cs

@@ -317,6 +317,12 @@ public class LinkModeFullClass {
 				ProjectName = "LinkTestLib",
 				Sdk = "Microsoft.NET.Sdk",
 				TargetFramework = "netstandard2.0",
+				PackageReferences = {
+					new Package {
+						Id = "sqlite-net-pcl",
+						Version = "1.7.335",
+					}
+				},
 				Sources = {
 					new BuildItem.Source ("Bug21578.cs") {
 						TextContent = () => {
@@ -330,23 +336,15 @@ public class LinkModeFullClass {
 								return sr.ReadToEnd ();
 						},
 					},
+					new BuildItem.Source ("Bug35195.cs") {
+						TextContent = () => {
+							using (var sr = new StreamReader (typeof (InstallAndRunTests).Assembly.GetManifestResourceStream ("Xamarin.Android.Build.Tests.Resources.LinkDescTest.Bug35195.cs")))
+								return sr.ReadToEnd ();
+						},
+					},
 				},
 			};
 
-			// sqlite-net-pcl does not work in .NET 6
-			if (!Builder.UseDotNet) {
-				lib2.PackageReferences.Add (new Package {
-					Id = "sqlite-net-pcl",
-					Version = "1.7.335",
-				});
-				lib2.Sources.Add (new BuildItem.Source ("Bug35195.cs") {
-					TextContent = () => {
-						using (var sr = new StreamReader (typeof (InstallAndRunTests).Assembly.GetManifestResourceStream ("Xamarin.Android.Build.Tests.Resources.LinkDescTest.Bug35195.cs")))
-							return sr.ReadToEnd ();
-					},
-				});
-			}
-
 			proj = new XamarinFormsAndroidApplicationProject () {
 				IsRelease = true,
 				AndroidLinkModeRelease = linkMode,
@@ -373,6 +371,14 @@ public class LinkModeFullClass {
 					},
 				},
 			};
+			if (Builder.UseDotNet) {
+				// NOTE: workaround for netcoreapp3.1 dependency preferred over monoandroid8.0
+				proj.PackageReferences.Add (new Package {
+					Id = "SQLitePCLRaw.lib.e_sqlite3.android",
+					Version = "2.0.4",
+				});
+			}
+
 			proj.AndroidManifest = proj.AndroidManifest.Replace ("</manifest>", "<uses-permission android:name=\"android.permission.INTERNET\" /></manifest>");
 			proj.SetAndroidSupportedAbis ("armeabi-v7a", "arm64-v8a", "x86", "x86_64");
 			using (var sr = new StreamReader (typeof (InstallAndRunTests).Assembly.GetManifestResourceStream ("Xamarin.Android.Build.Tests.Resources.LinkDescTest.MainActivityReplacement.cs")))