[LSC] Add LOCAL_LICENSE_KINDS to external/mime-support

Added legacy_unencumbered to:
  Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: Ice233d3643a7215cc3af4a777cd7d3bf5ce2acd2
1 file changed