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
Change-Id: Ic7205ecc80146cdd36b1a618c9c5cde114b98e71
1 file changed