Simplify app prediction service check

In support of sharesheet unbundling:
This code directly accesses private platform config resources
and cannot be used outside of system_server.

This was originally added during the Q->R transition as app
prediction service was ramping up [See b/138595943].
Incorrect versions would cause increased latency in opening
the sharesheet, app prediction missing but no crash.

If there is a problem with AiAi version configuration, that
should be addressed directly and not covered over by silently
disabling functionality.

At this time the package name returned from the system call
PackageManager#getAppPredictionServicePackageName() is passed
through the function "ensureSystemPackage" before being
returned this is sufficient to satisfy and availability checks.

Bug: 220895016
Test: manual; share content from app, verify share targets
Change-Id: I11aebe4fba1d96b543ba89482313668ce55b8ca4

core/java/com/android/internal/app/ChooserActivity.java

@@ -771,11 +771,6 @@ public class ChooserActivity extends ResolverActivity implements
             delegationIntent.setComponent(delegateActivity);
             delegationIntent.putExtra(Intent.EXTRA_INTENT, getIntent());
             delegationIntent.putExtra(ActivityTaskManager.EXTRA_PERMISSION_TOKEN, permissionToken);
-
-            // Query prediction availability; mIsAppPredictorComponentAvailable isn't initialized.
-            delegationIntent.putExtra(
-                    EXTRA_IS_APP_PREDICTION_SERVICE_AVAILABLE, isAppPredictionServiceAvailable());
-
             delegationIntent.addFlags(Intent.FLAG_ACTIVITY_PREVIOUS_IS_TOP);
 
             // Don't close until the delegate finishes, or the token will be invalidated.
@@ -972,34 +967,8 @@ public class ChooserActivity extends ResolverActivity implements
     /**
      * Returns true if app prediction service is defined and the component exists on device.
      */
-    @VisibleForTesting
-    public boolean isAppPredictionServiceAvailable() {
-        if (getPackageManager().getAppPredictionServicePackageName() == null) {
-            // Default AppPredictionService is not defined.
-            return false;
-        }
-
-        final String appPredictionServiceName =
-                getString(R.string.config_defaultAppPredictionService);
-        if (appPredictionServiceName == null) {
-            return false;
-        }
-        final ComponentName appPredictionComponentName =
-                ComponentName.unflattenFromString(appPredictionServiceName);
-        if (appPredictionComponentName == null) {
-            return false;
-        }
-
-        // Check if the app prediction component actually exists on the device. The component is
-        // only visible when this is running in a system activity; otherwise this check will fail.
-        Intent intent = new Intent();
-        intent.setComponent(appPredictionComponentName);
-        if (getPackageManager().resolveService(intent, PackageManager.MATCH_ALL) == null) {
-            Log.e(TAG, "App prediction service is defined, but does not exist: "
-                    + appPredictionServiceName);
-            return false;
-        }
-        return true;
+    private boolean isAppPredictionServiceAvailable() {
+        return getPackageManager().getAppPredictionServicePackageName() != null;
     }
 
     /**

core/tests/coretests/src/com/android/internal/app/ChooserActivityTest.java

@@ -1307,55 +1307,6 @@ public class ChooserActivityTest {
                 is(testBaseScore * SHORTCUT_TARGET_SCORE_BOOST));
     }
 
-    /**
-     * The case when AppPrediction service is not defined in PackageManager is already covered
-     * as a test parameter {@link ChooserActivityTest#packageManagers}. This test is checking the
-     * case when the prediction service is defined but the component is not available on the device.
-     */
-    @Test
-    public void testIsAppPredictionServiceAvailable() {
-        Intent sendIntent = createSendTextIntent();
-        List<ResolvedComponentInfo> resolvedComponentInfos = createResolvedComponentsForTest(2);
-        when(
-                ChooserActivityOverrideData
-                        .getInstance()
-                        .resolverListController
-                        .getResolversForIntent(
-                                Mockito.anyBoolean(),
-                                Mockito.anyBoolean(),
-                                Mockito.isA(List.class)))
-                .thenReturn(resolvedComponentInfos);
-
-        final ChooserActivity activity =
-                mActivityRule.launchActivity(Intent.createChooser(sendIntent, null));
-        waitForIdle();
-        if (activity.getPackageManager().getAppPredictionServicePackageName() == null) {
-            assertThat(activity.isAppPredictionServiceAvailable(), is(false));
-        } else {
-            if (!shouldTestTogglingAppPredictionServiceAvailabilityAtRuntime()) {
-                return;
-            }
-
-            // This isn't a toggle per-se, but isAppPredictionServiceAvailable only works in
-            // system (see comment in the method).
-            assertThat(activity.isAppPredictionServiceAvailable(), is(true));
-
-            ChooserActivityOverrideData.getInstance().resources =
-                    Mockito.spy(activity.getResources());
-            when(
-                    ChooserActivityOverrideData
-                            .getInstance()
-                            .resources
-                            .getString(
-                                    getRuntimeResourceId(
-                                            "config_defaultAppPredictionService",
-                                            "string")))
-                    .thenReturn("ComponentNameThatDoesNotExist");
-
-            assertThat(activity.isAppPredictionServiceAvailable(), is(false));
-        }
-    }
-
     @Test
     public void testConvertToChooserTarget_predictionService() {
         Intent sendIntent = createSendTextIntent();