Track the media projection FGS types per UID

The apps with active media projection should have a foreground
service with the type "mediaProjection" - the condition here is,
any process with such a FGS within this app would be sufficient,
it doesn't necessarily need to be in the same process with the
active media projection serssion.

Bug: 229699207
Test: atest CtsMediaProjectionTestCases:MediaProjectionManagerTest
Test: atest CtsMediaProjectionTestCases:MediaProjectionTest
Test: atest FrameworksServicesTests:MediaProjectionManagerServiceTest
Test: atest FrameworksServicesTests:DisplayManagerServiceTest
Change-Id: I015d2adc67f9e3d304281f4c9106ceced6d99a02