base project fixed

android/app/build.gradle

@@ -58,6 +58,9 @@ 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
+            minifyEnabled true
+            shrinkResources true
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
 }
@@ -67,5 +70,5 @@ flutter {
 }
 
 dependencies {
-  coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.0.4'
+  coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.1.4'
 }