Add LOCAL_LICENSE_KINDS to external/toybox

Added SPDX-license-identifier-0BSD SPDX-license-identifier-CC0-1.0
    SPDX-license-identifier-Unlicense legacy_unencumbered
to:
  Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Change-Id: I34ed16146d7c1f73ec73371a2a070c3b8d2a5621
1 file changed