Update Android Gradle plugin to 3.6.4 (#28170)

Summary:
Android Studio 3.6.3 is now available in the stable channel

https://androidstudio.googleblog.com/2020/04/android-studio-363-available.html

EDIT: Another patch update to `3.6.4` was released in July 2020:

> This minor update supports compatibility with new default settings and features for package visibility in Android 11.

Details: https://developer.android.com/studio/releases/gradle-plugin#3-6-0

## Changelog

[Android] [Changed] - Update Android Gradle plugin to 3.6.4

Pull Request resolved: https://github.com/facebook/react-native/pull/28170

Test Plan: Build project

Reviewed By: mdvacca

Differential Revision: D23357163

Pulled By: fkgozali

fbshipit-source-id: 45f1bfc8a1b21e60c6da03e60e4fa3b1e30c221c

build.gradle.kts

@@ -12,7 +12,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath("com.android.tools.build:gradle:3.5.3")
+        classpath("com.android.tools.build:gradle:3.6.4")
         classpath("de.undercouch:gradle-download-task:4.0.2")
 
         // NOTE: Do not place your application dependencies here; they belong

packages/react-native-codegen/android/build.gradle

@@ -12,7 +12,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath("com.android.tools.build:gradle:3.5.3")
+        classpath("com.android.tools.build:gradle:3.6.4")
     }
 }
 

packages/react-native-codegen/android/gradlePlugin-build/gradlePlugin/build.gradle

@@ -19,7 +19,7 @@ gradlePlugin {
 }
 
 dependencies {
-    implementation 'com.android.tools.build:gradle:3.5.3'
+    implementation 'com.android.tools.build:gradle:3.6.4'
     // Use the same Gson version that `com.android.tools.build:gradle` depends on.
     implementation 'com.google.code.gson:gson:2.8.5'
     implementation 'com.google.guava:guava:29.0-jre'

template/android/build.gradle

@@ -12,7 +12,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath("com.android.tools.build:gradle:3.5.3")
+        classpath("com.android.tools.build:gradle:3.6.4")
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }