Roll to 9d5ede0, disabling impeller for google_maps_flutter_android (#7294)

Attempts to unblock the flutter/flutter->flutter/packages roll, which is many days behind now, by turning off impeller in `google_maps_flutter_android` temporarily until flutter/flutter#152691 is fixed, so that we can roll past the commit that enabled it by default.

The alternative would be turn off device testing of `google_maps_flutter*`, but we've never been able to turn that test on for emulators so that would remove all `google_maps_flutter*` on Android, which is worse from the standpoint of things we need to test in this repo. There are a number of non-trivial changes happening to that package, so we need integration test coverage.

Author: stuartmorgan-g

.ci/flutter_master.version

@@ -1 +1 @@
-e2e43987c4fb5803c59d7ceb5048cf08bd22cffe
+9d5ede0f5ae511cb3b2f6de2ab9164a428db418e

packages/google_maps_flutter/google_maps_flutter_android/example/android/app/src/main/AndroidManifest.xml

@@ -5,7 +5,11 @@
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
 
     <application android:label="google_maps_flutter_example" android:icon="@mipmap/ic_launcher">
-      <meta-data
+        <!-- Temporary workaround for https://github.com/flutter/flutter/issues/152691 -->
+        <meta-data
+            android:name="io.flutter.embedding.android.EnableImpeller"
+            android:value="false" />
+        <meta-data
             android:name="com.google.android.gms.version"
             android:value="@integer/google_play_services_version" />
         <!-- Update this value to your google maps api key. -->