[LSC] Add LOCAL_LICENSE_KINDS to external/pffft am: 3e2ecbdc24 am: 3b884b26c0 am: da39db782b am: 314799d1aa am: 827ce476c9

Original change: https://android-review.googlesource.com/c/platform/external/pffft/+/1588588

Change-Id: I76161862fd9f45022d26951d7e9250c62108e58a