[LSC] Add LOCAL_LICENSE_KINDS to external/oauth

Added SPDX-license-identifier-Apache-2.0 to:
  Android.bp
  core/src/main/java/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I11f52a7bd611a5d70e7781553283a39a760b01e3
2 files changed