[Autofill PCC]: Optimize PCC Detection calling

PCC Detection feature should only be enabled if both conditions are satisfied.
1. flag:pcc_classification_enabled is enabled
2. Device has config: config_defaultFieldClassificationService defined.

In the absence of either of the above, PCC feature should be turned off.

Test: atest CtsAutoFillServiceTestCases
The above 'atest CtsAutoFillServiceTestCases' was ran in two cases
1. config_defaultFieldClassificationService not present on device.
2. config_defaultFieldClassificationService defined on the device.
Also, ran through Autofill usecase manually.
Bug: 279610519

Merged-In: I92f509b150586f7ad35580240a2981c1d31f10a9
Change-Id: I92f509b150586f7ad35580240a2981c1d31f10a9

services/autofill/java/com/android/server/autofill/AutofillManagerService.java

@@ -760,6 +760,12 @@ public final class AutofillManagerService
         return false;
     }
 
+    // Called by Shell command
+    String getFieldDetectionServiceName(@UserIdInt int userId) {
+        enforceCallingPermissionForManagement();
+        return mFieldClassificationResolver.readServiceName(userId);
+    }
+
     // Called by Shell command
     boolean setTemporaryDetectionService(@UserIdInt int userId, @NonNull String serviceName,
             int durationMs) {
@@ -903,9 +909,9 @@ public final class AutofillManagerService
     }
 
     /**
-     * Whether the Autofill PCC Classification feature is enabled.
+     * Whether the Autofill PCC Classification feature flag is enabled.
      */
-    public boolean isPccClassificationEnabled() {
+    public boolean isPccClassificationFlagEnabled() {
         synchronized (mFlagLock) {
             return mPccClassificationEnabled;
         }

services/autofill/java/com/android/server/autofill/AutofillManagerServiceImpl.java

@@ -1730,6 +1730,23 @@ final class AutofillManagerServiceImpl
         return mRemoteFieldClassificationService;
     }
 
+
+    public boolean isPccClassificationEnabled() {
+        boolean result = isPccClassificationEnabledInternal();
+        if (sVerbose) {
+            Slog.v(TAG, "pccEnabled: " + result);
+        }
+        return result;
+    }
+
+    public boolean isPccClassificationEnabledInternal() {
+        boolean flagEnabled = mMaster.isPccClassificationFlagEnabled();
+        if (!flagEnabled) return false;
+        synchronized (mLock) {
+            return getRemoteFieldClassificationServiceLocked() != null;
+        }
+    }
+
     /**
      * Called when the {@link AutofillManagerService#mFieldClassificationResolver}
      * changed (among other places).

services/autofill/java/com/android/server/autofill/AutofillManagerServiceShellCommand.java

@@ -26,6 +26,7 @@ import android.os.RemoteCallback;
 import android.os.ShellCommand;
 import android.os.UserHandle;
 import android.service.autofill.AutofillFieldClassificationService.Scores;
+import android.text.TextUtils;
 import android.view.autofill.AutofillManager;
 
 import com.android.internal.os.IResultReceiver;
@@ -154,6 +155,8 @@ public final class AutofillManagerServiceShellCommand extends ShellCommand {
                 return getBindInstantService(pw);
             case "default-augmented-service-enabled":
                 return getDefaultAugmentedServiceEnabled(pw);
+            case "field-detection-service-enabled":
+                return isFieldDetectionServiceEnabled(pw);
             case "saved-password-count":
                 return getSavedPasswordCount(pw);
             default:
@@ -343,6 +346,14 @@ public final class AutofillManagerServiceShellCommand extends ShellCommand {
         return 0;
     }
 
+    private int isFieldDetectionServiceEnabled(PrintWriter pw) {
+        final int userId = getNextIntArgRequired();
+        String name = mService.getFieldDetectionServiceName(userId);
+        boolean enabled = !TextUtils.isEmpty(name);
+        pw.println(enabled);
+        return 0;
+    }
+
     private int setTemporaryAugmentedService(PrintWriter pw) {
         final int userId = getNextIntArgRequired();
         final String serviceName = getNextArg();

services/autofill/java/com/android/server/autofill/Session.java

@@ -798,7 +798,7 @@ final class Session implements RemoteFillService.FillServiceCallbacks, ViewState
      * Returns empty list if PCC is off or no types available
     */
     private List<String> getTypeHintsForProvider() {
-        if (!mService.getMaster().isPccClassificationEnabled()) {
+        if (!mService.isPccClassificationEnabled()) {
             return Collections.EMPTY_LIST;
         }
         final String typeHints = mService.getMaster().getPccProviderHints();
@@ -1200,7 +1200,7 @@ final class Session implements RemoteFillService.FillServiceCallbacks, ViewState
         // structure is taken. This causes only one fill request per burst of focus changes.
         cancelCurrentRequestLocked();
 
-        if (mService.getMaster().isPccClassificationEnabled()
+        if (mService.isPccClassificationEnabled()
                 && mClassificationState.mHintsToAutofillIdMap == null) {
             if (sVerbose) {
                 Slog.v(TAG, "triggering field classification");
@@ -1631,7 +1631,7 @@ final class Session implements RemoteFillService.FillServiceCallbacks, ViewState
             Slog.d(TAG, "DBG: computeDatasetsForProviderAndUpdateContainer: "
                     + autofillProviderContainer);
         }
-        if (!mService.getMaster().isPccClassificationEnabled())  {
+        if (!mService.isPccClassificationEnabled())  {
             if (sVerbose) {
                 Slog.v(TAG, "PCC classification is disabled");
             }