13700 update flutter 1.9

android/app/build.gradle

@@ -1,8 +1,8 @@
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
-  localPropertiesFile.withInputStream { stream ->
-    localProperties.load(stream)
+  localPropertiesFile.withReader('UTF-8') { reader ->
+    localProperties.load(reader)
   }
 }
 
@@ -48,6 +48,7 @@ android {
       signingConfig signingConfigs.debug
     }
     release {
+      shrinkResources false
       minifyEnabled false
       signingConfig signingConfigs.release
       proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

android/build.gradle

@@ -6,7 +6,7 @@ buildscript {
   }
 
   dependencies {
-    classpath 'com.android.tools.build:gradle:3.4.2'
+    classpath 'com.android.tools.build:gradle:3.5.0'
     classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
   }
 }

android/gradle.properties

@@ -1,3 +1,4 @@
 android.enableJetifier=true
 android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536M
+android.enableR8=false