android build [nfc]: Add a lint-suppression line.

Part of the RN v0.61 -> v0.62 changes to the template app [1],
corresponding to facebook/react-native@87f94d558. This may freely be
done before the upgrade commit.

This `// noinspection` line is mentioned in an obsolete Android
Studio doc on suppressing lint warnings [2]; it's not clear that it's
the best way to do what it says it does. But might as well follow
the template.

[1] https://react-native-community.github.io/upgrade-helper/?from=0.61.5&to=0.62.2

[2] http://tools.android.com/tips/lint/suppressing-lint-warnings (be
    sure to click "stop" before the timer runs out on the automatic
    redirect)

android/app/build.gradle

@@ -226,6 +226,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.0.0'
     implementation "com.google.firebase:firebase-messaging:17.3.4"
     implementation "me.leolin:ShortcutBadger:1.1.16@aar"
+    //noinspection GradleDynamicVersion
     implementation "com.facebook.react:react-native:+"  // From node_modules
 
     if (enableHermes) {