build: update for Android Studio 4.0

Change-Id: I4d56fd120b2bfd94bbb4a569046a4f340e3c2c76

ring-android/app/build.gradle

@@ -31,6 +31,10 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+    buildFeatures {
+        viewBinding true
+        dataBinding true
+    }
     flavorDimensions "push"
     productFlavors {
         noPush {
@@ -58,12 +62,6 @@ android {
             universalApk true
         }
     }
-    viewBinding {
-        enabled true
-    }
-    dataBinding {
-        enabled true
-    }
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_1_8
         targetCompatibility = JavaVersion.VERSION_1_8

ring-android/build.gradle

@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.2'
+        classpath 'com.android.tools.build:gradle:4.0.0'
         classpath 'com.google.gms:google-services:4.3.3'
     }
 }

ring-android/gradle/wrapper/gradle-wrapper.properties

-#Thu Dec 19 21:17:09 EST 2019
+#Tue Apr 28 13:58:35 EDT 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip