Add "mts" to target used in tests

Bug: 195905753
Bug: 195210087
Change-Id: I4c2ea59226768d3dc19d441b9afc8fbd6556cab8
Test: m mts && run mts -m CtsProviderTestCases
Test: m mts && mts-tradefed run mts-mediaprovider
(cherry picked from commit b9fad0895aa5dfffa12738842b2e2bff9a8affed)
2 files changed