removed proguard; gradle changes

src/android/app/build.gradle

@@ -62,7 +62,6 @@ 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
         }
     }
 }
@@ -76,5 +75,4 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
-    implementation 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'
 }

src/android/app/proguard-rules.pro

@@ -1 +0,0 @@
--keep class androidx.lifecycle.DefaultLifecycleObserver