Added `not_multi_abi` configuration for keystore2_client_tests module. Changes made to avoid running keystore2_client_tests of armeabi-v7a builds on arm64-v8a platforms. Bug: 322112515 Test: run vts -m keystore2_client_tests (cherry picked from https://android-review.googlesource.com/q/commit:a8cf68ef41c1f7949bb028db31e22b6cc621ac92) Merged-In: Ic7205ecc80146cdd36b1a618c9c5cde114b98e71 Change-Id: Ic7205ecc80146cdd36b1a618c9c5cde114b98e71