upgrade build tools and enable r8 full mode (#1198)

* upgrade build tools and enable r8 full mode

* fix media description in fragment_view_video

app/src/main/res/layout/fragment_view_video.xml

@@ -8,20 +8,6 @@
     android:clickable="true"
     android:focusable="true">
 
-    <TextView
-        android:id="@+id/mediaDescription"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        app:layout_constraintTop_toBottomOf="@+id/toolbar"
-        app:layout_constraintBottom_toTopOf="@+id/videoPlayer"
-        android:background="#60000000"
-        android:lineSpacingMultiplier="1.1"
-        android:padding="8dp"
-        android:textAlignment="center"
-        android:textColor="#eee"
-        android:textSize="?attr/status_text_medium"
-        tools:text="Some media description" />
-
     <VideoView
         android:id="@+id/videoPlayer"
         android:layout_width="match_parent"
@@ -33,6 +19,20 @@
         android:layout_gravity="center"
         />
 
+    <TextView
+        android:id="@+id/mediaDescription"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="?attr/actionBarSize"
+        app:layout_constraintTop_toTopOf="parent"
+        android:background="#60000000"
+        android:lineSpacingMultiplier="1.1"
+        android:padding="8dp"
+        android:textAlignment="center"
+        android:textColor="#eee"
+        android:textSize="?attr/status_text_medium"
+        tools:text="Some media description" />
+
     <ProgressBar
         android:id="@+id/progressBar"
         android:layout_width="wrap_content"

build.gradle

@@ -8,7 +8,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build.jetifier:jetifier-processor:1.0.0-beta04'
-        classpath 'com.android.tools.build:gradle:3.3.2'
+        classpath 'com.android.tools.build:gradle:3.4.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }

gradle.properties

@@ -18,3 +18,4 @@ org.gradle.parallel=true
 android.enableJetifier=true
 android.useAndroidX=true
 android.enableUnitTestBinaryResources=true
+android.enableR8.fullMode=true