STS add Mainline test skips

Bug: 238805898
Test: sts-tradefed run sts-dynamic-develop --test-arg com.android.tradefed.testtype.AndroidJUnitTest:instrumentation-arg:sts-should-skip-mainline:=true --build-attribute "sts-should-skip-mainline=true"
Change-Id: I5d78cee2f4bbc3a66cbcf31fb6151910147bc7be
4 files changed
tree: 135a3fbd737859714cddecf9c5b8a669fa390175
  1. build/
  2. docs/
  3. emu_test/
  4. libraries/
  5. scripts/
  6. tests/
  7. utils/
  8. PREUPLOAD.cfg