Build(Release): Fix R8 minify

Fix application cannot start after enabling minify

app/proguard-rules.pro

@@ -12,6 +12,11 @@
 #   public *;
 #}
 
+# Keep DataStore fields
+-keepclassmembers class * extends com.google.protobuf.GeneratedMessageLite* {
+   <fields>;
+}
+
 # Uncomment this to preserve the line number information for
 # debugging stack traces.
 #-keepattributes SourceFile,LineNumberTable