Remove one foregrond service restriction.

Because it breaks AssistantTest-testSteeringWheelButton test.

Bug: 149835015
Test: com.google.android.projection.gearhead.test.functional#AssistantTest-testSteeringWheelButton
Change-Id: Id6b2c97e14fcdd6f8d970fad3312c4f24e8eb786
(cherry picked from commit 3f7a6d93)