Include proguard config (#1842)

This will remove the requirement for people to add the proguard configs themselves. A lot of people first release to production with proguard and then realize why the app crashes. This will solve such issues.

This uses android's consumer proguard setting to enable specific proguard config.

android/build.gradle

@@ -54,6 +54,8 @@ android {
         //noinspection OldTargetApi
         targetSdkVersion safeExtGet('targetSdkVersion', 28)
         buildConfigField "boolean", "IS_NEW_ARCHITECTURE_ENABLED", isNewArchitectureEnabled().toString()
+        
+        consumerProguardFiles 'proguard-rules.pro'
     }
     lintOptions {
         abortOnError false