gta4xl-common: Enable usage of dex2oat64

Use 64-bit dex2oat for better dexopt time.

Bug: 153380900
Test: boot and install an application
Change-Id: I3e7a6e6e9385ff6564d1a2e6dda004ebb061f095
(cherry picked from commit 126f03be80f57a8a0411842011152d9381589b78)
Merged-In: I3e7a6e6e9385ff6564d1a2e6dda004ebb061f095
diff --git a/vendor.prop b/vendor.prop
index 03967cf..1fd943b 100644
--- a/vendor.prop
+++ b/vendor.prop
@@ -32,6 +32,7 @@
 bluetooth.profile.sap.server.enabled=true
 
 ## Dalvik
+dalvik.vm.dex2oat64.enabled=true
 dalvik.vm.lockprof.threshold=500
 
 ## FRP