Limited use key: feature files

Add files for limited use key feature. So that the app
developer can know whether KeyMint cannot enforce this
feature in hardware, can only enforce when count == 1
or can enforce with any number of count(>=1).

Test: compile
Change-Id: I33349c4f968fa7b16055acd3db2e0cb80c0c5df1
Merged-In: I33349c4f968fa7b16055acd3db2e0cb80c0c5df1