Fix PHONY target usage in robolectric coverage

Phony targets should be labelled with .PHONY, real files should not
depend on PHONY targets.

Test: m RunFrameworksServicesRoboTests-coverage
Test: m RunFrameworksServicesRoboTests-jacoco
Test: add --writable=out/ to kati flags, see fewer warnings with this change
Change-Id: Icf187043b27294d5d3c50861fb62b2ce44f2c2c9
2 files changed