Minor corrections to the Keymaster4 documentation.

Gramatical and punctuation corrections; addition of missing
userSecureId to AuthorizationList schema and removal of extraneous
rollbackResistant from same; correction of OS_PATCHLEVEL source
property; and addition of missing TAG_UNLOCKED_DEVICE_REQUIRED
documentation.

Bug: 69550260
Test: N/A
Change-Id: I04092b7df3af69201ba1467cddc09f6f44e861a8