- [dependencies][android] remove all Firebase SDKs in favour of Firebase BoM

- [android] upgrade to Android X
- [android] upgrade gradle wrapper to v5.4.1
- [android][ios][tests] remove manual packages & enable auto-linking
- [tests][internal] upgrade tests project to RN 60
- [ios] temporarily remove framework support in pods - broken in RN 60 - see https://github.com/facebook/react-native/issues/25349
- [linting] switch to use rn community linting rules

scripts/_TEMPLATE_/android/build.gradle

@@ -4,7 +4,7 @@ buildscript {
     jcenter()
   }
   dependencies {
-    classpath 'com.android.tools.build:gradle:3.4.0'
+    classpath 'com.android.tools.build:gradle:3.4.2'
   }
 }
 
@@ -24,12 +24,8 @@ project.ext {
         buildTools: "28.0.3"
       ],
 
-      googlePlayServices: [
-        base: "16.1.0",
-      ],
-
       firebase          : [
-        _template_: "16.0.8"
+        bom: "21.1.0"
       ],
     ],
   ])
@@ -56,8 +52,8 @@ repositories {
 
 dependencies {
   api project(':@react-native-firebase_app')
-  implementation "com.google.firebase:firebase-_template_:${ReactNative.ext.getVersion("firebase", "_template_")}"
-  implementation "com.google.android.gms:play-services-base:${ReactNative.ext.getVersion("googlePlayServices", "base")}"
+  implementation platform("com.google.firebase:firebase-bom:${ReactNative.ext.getVersion("firebase", "bom")}")
+  implementation "com.google.firebase:firebase-_template_"
 }
 
 ReactNative.shared.applyPackageVersion()

scripts/_TEMPLATE_/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip