Bump AGP (#16380)

ref: https://issuetracker.google.com/issues/184872412

This is an issue of AGP 4.1. Updating AGP to 4.2 or above should fix it.

We've been fixing this for F-Droid for a while: https://gitlab.com/fdroid/fdroiddata/-/blob/master/metadata/com.retroarch.yml#L43

Author: licaon-kter

pkg/android/phoenix/build.gradle

@@ -5,7 +5,7 @@ buildscript {
   }
 
   dependencies {
-    classpath 'com.android.tools.build:gradle:4.1.0'
+    classpath 'com.android.tools.build:gradle:4.2.0'
   }
 }