Disable Treble OMX by default.

Test: Manual use of Camera, Movies, Photos and YouTube apps.

Test: With CtsMediaTestCases.apk installed,
adb shell am instrument -e size small -w
'android.media.cts/android.support.test.runner.AndroidJUnitRunner'

Bug: 31399200
Change-Id: Ib2d43fcfc7bbd00d47cf81a98b415d2be2e0e12a
diff --git a/device.mk b/device.mk
index c95c6a5..356dff0 100644
--- a/device.mk
+++ b/device.mk
@@ -473,6 +473,10 @@
     persist.audio.product.identify="angler" \
     persist.audio.fluence.speaker=true
 
+# Default OMX service to non-Treble
+PRODUCT_PROPERTY_OVERRIDES += \
+    persist.media.treble_omx=false
+
 # Enable AAC 5.1 output
 PRODUCT_PROPERTY_OVERRIDES += \
     media.aac_51_output_enabled=true