added a proguard file

play-services-core/proguard-rules.pro

@@ -0,0 +1,59 @@
+# We're referencing stuff that is unknown to the system
+#-libraryjar ../unifiednlp-compat/build/classes/java/main
+-dontwarn java.awt.**
+-dontwarn javax.annotation.**
+
+# External libs
+-dontwarn okio.**
+-dontwarn com.squareup.okhttp.**
+-dontwarn org.oscim.tiling.source.OkHttpEngine
+-dontwarn org.oscim.tiling.source.OkHttpEngine$OkHttpFactory
+-dontwarn com.caverock.androidsvg.**
+-dontwarn org.slf4j.**
+-dontwarn org.codehaus.jackson.**
+-dontwarn com.android.location.provider.**
+
+# Disable ProGuard Notes, they won't help here
+-dontnote
+
+# Keep dynamically loaded GMS classes
+-keep public class com.google.android.gms.common.security.ProviderInstallerImpl { public *; }
+-keep public class com.google.android.gms.cast.framework.internal.CastDynamiteModuleImpl { public *; }
+
+# Keep AutoSafeParcelables
+-keep public class * extends org.microg.safeparcel.AutoSafeParcelable {
+    @org.microg.safeparcel.SafeParceled *;
+}
+
+# Keep form data
+-keepclassmembers class * {
+    @org.microg.gms.common.HttpFormClient$* *;
+}
+
+# Keep our stuff
+-keep class org.microg** { *; }
+-keep class com.google.android.gms** { *; }
+-keep class com.mgoogle** { *; }
+-keepdirectories org/microg**
+-keepdirectories com/google/android/gms**
+-keepdirectories com/mgoogle**
+
+# Keep asInterface method cause it's accessed from SafeParcel
+-keepattributes InnerClasses
+-keepclassmembers interface * extends android.os.IInterface {
+    public static class *;
+}
+-keep public class * extends android.os.Binder { public static *; }
+
+# Keep library info
+-keep class **.BuildConfig { *; }
+
+# Keep protobuf class builders
+-keep public class com.squareup.wire.Message
+-keep public class * extends com.squareup.wire.Message
+-keep public class * extends com.squareup.wire.Message$Builder { public <init>(...); }
+
+# Proguard configuration for Jackson 1.x
+-keepclassmembers class * {
+     @org.codehaus.jackson.annotate.* *;
+}