[LSC] Add LOCAL_LICENSE_KINDS to frameworks/base

Added SPDX-license-identifier-Apache-2.0 to:
  packages/SettingsLib/TwoTargetPreference/Android.bp
  services/api/Android.bp
  services/tests/servicestests/test-apps/PackageParsingTestManifests/Android.bp
  tests/FlickerTests/test-apps/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I12b67c8466fbb1973d6b06f40b88d4e1e88e9a91