[LSC] Add LOCAL_LICENSE_KINDS to external/arm-optimized-routines

Added SPDX-license-identifier-MIT to:
  Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: Id4d7093b8a781d32de4ef0e931ac99d91cfd775b