Changes made to compile keystore2_client_tests module with
compile_multilib set to first.

To avoid missing dependent library (libkeymaster_portable.so) error,
enforcing to compile for 64-bit on a 64-bit platform, and 32-bit on
a 32-bit platform.

Bug: 314110490
Test: run vts -m keystore2_client_tests
Change-Id: I5e8bf94ed37209f69ace2d7dd2c0ca1b680fc86d
diff --git a/keystore2/tests/Android.bp b/keystore2/tests/Android.bp
index e09b224..01ea746 100644
--- a/keystore2/tests/Android.bp
+++ b/keystore2/tests/Android.bp
@@ -23,6 +23,7 @@
 
 rust_test {
     name: "keystore2_client_tests",
+    compile_multilib: "first",
     defaults: [
         "keymint_use_latest_hal_aidl_rust",
         "keystore2_use_latest_aidl_rust",