Create new Keystore2 java_aconfig_library

In order to flag frameworks code using Keystore2 flags, create a new library specifically for frameworks that depends on `framework-minus-apex-aconfig-java-defaults`. Without this (e.g. if `keystore2_flags_java` is used instead), a flag cycle dependency is created (b/293195086).

Bug: 369375199
Test: treehugger
(cherry picked from https://android-review.googlesource.com/q/commit:36d895698037452da03c8f855a17709057744fcd)
Ignore-AOSP-First: Running into automerger merge conflict issues (https://screenshot.googleplex.com/BF2rGYKdoDQvR2F) on AOSP wrt merging (a dependent CL) downstream into git_main, so merging internally first.
Merged-In: I5f039a3c4a69eb6fb8c21fbf5849a85dea49e8f5
Change-Id: I5f039a3c4a69eb6fb8c21fbf5849a85dea49e8f5
1 file changed