example: fix android release build for camera_manipulation

examples/flutter/camera_manipulation/android/app/build.gradle

@@ -35,6 +35,8 @@ android {
             // TODO: Add your own signing config for the release build.
             // Signing with the debug keys for now, so `flutter run --release` works.
             signingConfig = signingConfigs.debug
+            shrinkResources false
+            minifyEnabled false
         }
     }
 }