sm7125: Enable usage of dex2oat64

Use 64-bit dex2oat for better dexopt time.
Move it to system.prop

Bug: 153380900
Test: boot and install an application
Change-Id: I3e7a6e6e9385ff6564d1a2e6dda004ebb061f095
(cherry picked from commit 126f03be80f57a8a0411842011152d9381589b78)
Merged-In: I3e7a6e6e9385ff6564d1a2e6dda004ebb061f095
Signed-off-by: Henrique Pereira <hlcpereira@outlook.com.br>

system.prop

@@ -15,6 +15,9 @@ ro.config.dha_th_rate=2.3
 ro.config.sdha_apps_bg_max=64
 ro.config.sdha_apps_bg_min=8
 
+# Dex2oat
+dalvik.vm.dex2oat64.enabled=true
+
 # RIL Powersaving
 persist.radio.add_power_save=1
 pm.sleep_mode=1

vendor.prop

@@ -126,7 +126,6 @@ dalvik.vm.heapmaxfree=8m
 dalvik.vm.lockprof.threshold=500
 
 # ART
-dalvik.vm.dex2oat64.enabled=true
 dalvik.vm.systemuicompilerfilter=speed
 ro.sys.fw.dex2oat_thread_count=8
 dalvik.vm.boot-dex2oat-threads=8