Bump version codes and name to v20

Test: n/a
PiperOrigin-RevId: 190500474
Change-Id: I1d73a90bf37b36c454b2d72102193764f4e25013
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 26fed40..f5cbd02 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="250000"
-  android:versionName="19.0">
+  android:versionCode="260000"
+  android:versionName="20.0">
 
   <uses-sdk
     android:minSdkVersion="24"