[CTS incremental] Add assumption to check if adb incremental is supported

No need to run these tests if the adb binary on the host doesn't support incremental.

Test: cts-tradefed run cts -m CtsIncrementalInstallHostTestCases
Bug: 153700435
Change-Id: I8d02193c1a2bf5282e7b419ddd2267131ac6bd1d
1 file changed