Hie, I haven't explicitly mentioned in pro-guard files but I am receiving this from my Gradle output
Note: the configuration refers to the unknown class 'com.google.android.gms.common.api.internal.BasePendingResult.ReleasableResultGuardian' Note: the configuration refers to the unknown class 'com.google.android.gms.common.internal.safeparcel.SafeParcelable'
but I haven't mentioned anything in proguard-rules.pro
regarding those libraries.