Update to "clean break" Keymaster::4.0

Keymaster 4.0 is being revised to remove references to 3.0, so we
don't have to deal with a mixture of types.  This CL updates
system/keymaster for that change.

Test: VtsHalKeymasterV4_0TargetTest
Change-Id: I3dfaf6ff61390bd1037b2ddb829b3aa22ff99c94
1 file changed