Add feature flag for Android automotive OS templates host

Bug: 204165454
Fix: 204165454
Test: Build gcar_emu_x86_64-userdebug then run \
android.app.cts.SystemFeaturesTest#testFeatureNamespaces

Change-Id: I77f817ae02e581e010cdd7eb3ee9e4d1c1bb8e37
1 file changed