Fix loopers in TileServices

For some reason, we were injecting a main Looper and also creating a
separate handler using mainLooper. Instead, just use the same injected
looper, but create a new handler for TileServiceManager.

Test: atest TileServicesTest
Test: atest CtsTileServiceTestCases
Bug: 172251878
Change-Id: I75ff29d7d80ccfe63051113ffa5ba15acad4bb82