message: Prevent proguard obfuscation for KTX1Loader.
diff: -keepclassmembers class * {
  @com.google.android.filament.proguard.UsedBy* *;
  }
  +
  +# These classes is loaded via env->FindClass() from Utils.cpp
  +# They are in the utils namespace and therefore not covered by previous rules.
  +-keep class com.google.android.filament.utils.KTX1Loader
  +-keep class com.google.android.filament.utils.HDRLoader
  +
  +# These native JNI methods are loaded via env->RegisterNatives() from Utils.cpp
  +-keepclassmembers class com.google.android.filament.utils.KTX1Loader {
  + native <methods>;
  +}
  +-keepclassmembers class com.google.android.filament.utils.HDRLoader {
  + native <methods>;
  +}
  +
  