add proguard rule for protobuf-lite

Author: supervacuus

sentry-android-core/proguard-rules.pro

@@ -54,6 +54,10 @@
 
 -keepnames class io.sentry.android.core.ApplicationNotResponding
 
+# protobuf-java lite
+# https://github.com/protocolbuffers/protobuf/blob/5d876c9fec1a6f2feb0750694f803f89312bffff/java/lite.md#r8-rule-to-make-production-app-builds-work
+-keep class * extends com.google.protobuf.GeneratedMessageLite { *; }
+
 ##---------------End: proguard configuration for android-core  ----------
 
 ##---------------Begin: proguard configuration for sentry-apollo-3  ----------