HWUI: fix prep_buller, so it locks powerlevels for gpu

bug:31501517
Change-Id: I4c2006b66f6cb0cf2e3a94966651652c1d3d287d
diff --git a/libs/hwui/tests/scripts/stopruntime.sh b/libs/hwui/tests/scripts/stopruntime.sh
old mode 100644
new mode 100755
index bb8fcb6..85a91db
--- a/libs/hwui/tests/scripts/stopruntime.sh
+++ b/libs/hwui/tests/scripts/stopruntime.sh
@@ -22,6 +22,5 @@
     adb shell kill $pid
 done
 adb shell setprop debug.egl.traceGpuCompletion 1
+adb shell setprop debug.sf.nobootanimation 1
 adb shell daemonize surfaceflinger
-sleep 3
-adb shell setprop service.bootanim.exit 1