[LSC] Add LOCAL_LICENSE_KINDS to prebuilts/sdk

Added SPDX-license-identifier-Apache-2.0 to:
  current/optional/Android.bp

Added SPDX-license-identifier-Apache-2.0 SPDX-license-identifier-OFL
    SPDX-license-identifier-Unicode-DFS
to:
  current/androidx/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I169abc93b7da705abe6b1a9e0db67d3a0ca5e0ba
1 file changed