flipper android: Upgrade from 0.54.0 to 0.75.1.

Done to follow the template-app change in
facebook/react-native@7159bcbf7, on the path to the RN v0.64
upgrade.

Author: chrisbobbe

android/gradle.properties

@@ -28,4 +28,4 @@ android.useAndroidX=true
 android.enableJetifier=true
 
 # Version of flipper SDK to use with React Native
-FLIPPER_VERSION=0.54.0
+FLIPPER_VERSION=0.75.1