Override package name for VNDK APEX

com.android.vndk.v<VER> is overridden with
com.google.android.vndk.v<VERE>.

Test: m com.android.vndk.current
    && aapt2 dump badging ../system/apex/com.android.vndk.current.apex
Change-Id: I623d7a144418d7198f0bbf09c5dc983ed1a631c6
Merged-In: I623d7a144418d7198f0bbf09c5dc983ed1a631c6
(cherry picked from commit 0ed1b1b169)

apex/vndk.go

@@ -26,7 +26,8 @@ import (
 )
 
 const (
-	vndkApexNamePrefix = "com.android.vndk.v"
+	vndkApexName       = "com.android.vndk"
+	vndkApexNamePrefix = vndkApexName + ".v"
 )
 
 // apex_vndk creates a special variant of apex modules which contains only VNDK libraries.