Add TAPL as a direct dependency to the flicker tests

TAPL is currently imported as part of other dependencies. However, as
per guidelines form go/tapl, these dependencies must be
android_library. This CL adds TAPL as a direct dependency to the test to
comply with the usage guidelines

Test: atest FlickerTests
Change-Id: I9b21a4b4906a6ba64d7895dc5a3e544080e082fb