Move AIDL-derived defaults for keystore2

The defaults that include the latest code generated from the Keystore2
AIDL interface are better located in the Android.bp file that holds
the AIDL interface target itself.

Test: TreeHugger
Flag: EXEMPT refactor
Bug: 379008955
Change-Id: I613c6b49d54c98bbe7e10fcd6b4bbd9af949c0c0
1 file changed