Correct the PropertyInvalidatedCache module definition

Bug: 219609105

Change the meaning of "module" in PropertyInvalidatedCache to be a
string rather than an integer.  One piece of the unit test has been
removed because of this.

Lint uncovered several lock errors.  These are corrected as well.

The corresponding CTS test is updated in the next review.

Test:
 * atest FrameworksCoreTests:PropertyInvalidatedCacheTests

Change-Id: Iaaa55974df2d22fc052d5b4b4744384c012f070a