[LSC] Add LOCAL_LICENSE_KINDS to packages/apps/DocumentsUI

Added SPDX-license-identifier-Apache-2.0 to:
  app-perf-tests/Android.bp
  perf-tests/Android.bp
  tests/Android.bp

Added SPDX-license-identifier-Apache-2.0 legacy_unencumbered to:
  Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: Ie39012d186473a97039ee877f959292d2aa226a3