disable code coverage for Q media modules

Code coverage for Q modules requires files from the system
image that are not present in all Q devices. This should not propagate
on to the R branches; merged-in lines should prevent that.

Bug: 151611818
Test: build, examination
Merged-In: I9d5880343347ddc586e50f9eafb65e1ff7ba3748
Merged-In: I34213fbc93ca51696b6a5a3c60bfd3ffa7ce6764
Change-Id: I1293a124d862a1539c6f916a4184d66e24c8215f