Bump version codes and name to v21

Test: n/a
PiperOrigin-RevId: 193977078
Change-Id: I17fa9b4acb3867c75ff65b5a6edcdd30e15990f8
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index f5cbd02..3d8f7a4 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -16,8 +16,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
   coreApp="true"
   package="com.android.dialer"
-  android:versionCode="260000"
-  android:versionName="20.0">
+  android:versionCode="2700000"
+  android:versionName="21.0">
 
   <uses-sdk
     android:minSdkVersion="24"