Add routing type flags

Allow providers to indicate the types of routing it supports.

Bug: b/362507305
Test: atest CtsMediaBetterTogetherTestCases CtsMediaHostTestCasts
Flag: com.android.media.flags.enable_mirroring_in_media_router_2
Change-Id: I825b11cb3da20ed4398d81613e5e6bf5f2d3221e