Limit SafetyNet workarounds to unstable GMS process

The unstable process is where SafetyNet attestation actually runs, so
we only need to spoof the model in that process. Leaving other processes
fixes various issues caused by model detection and flag provisioning,
including screen-off Voice Match in Google Assistant, broken At a Glance
weather and settings on Android 12, and more.

Change-Id: Idcf663907a6c3d0408dbd45b1ac53c9eb4200df8

core/java/com/android/internal/gmscompat/AttestationHooks.java

@@ -29,6 +29,8 @@ public final class AttestationHooks {
     private static final String TAG = "GmsCompat/Attestation";
 
     private static final String PACKAGE_GMS = "com.google.android.gms";
+    private static final String PROCESS_UNSTABLE = "com.google.android.gms.unstable";
+
     private static volatile boolean sIsGms = false;
 
     private AttestationHooks() { }
@@ -55,7 +57,8 @@ private static void spoofBuildGms() {
     }
 
     public static void initApplicationBeforeOnCreate(Application app) {
-        if (PACKAGE_GMS.equals(app.getPackageName())) {
+        if (PACKAGE_GMS.equals(app.getPackageName()) &&
+                PROCESS_UNSTABLE.equals(Application.getProcessName())) {
             sIsGms = true;
             spoofBuildGms();
         }