Check for available rotation resolver service and camera permission before showing setting for face based auto-rotation

Test: locally with crosshatch & make -j64 RunSettingsRoboTests
ROBOTEST_FILTER="com.android.settings.display.SmartAutoRotateControllerTest"

Bug: 172857585
Change-Id: I825b0c2471c71a3de59532b39a47c5442f234fb5

src/com/android/settings/display/SmartAutoRotateController.java

@@ -17,9 +17,15 @@ package com.android.settings.display;
 
 import static android.provider.Settings.Secure.CAMERA_AUTOROTATE;
 
+import android.Manifest;
 import android.app.settings.SettingsEnums;
 import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
 import android.provider.Settings;
+import android.service.rotationresolver.RotationResolverService;
+import android.text.TextUtils;
 
 import androidx.preference.Preference;
 
@@ -43,13 +49,17 @@ public class SmartAutoRotateController extends TogglePreferenceController implem
 
     @Override
     public int getAvailabilityStatus() {
-        return !RotationPolicy.isRotationLocked(mContext)
+        if (!isRotationResolverServiceAvailable(mContext)) {
+            return UNSUPPORTED_ON_DEVICE;
+        }
+        return !RotationPolicy.isRotationLocked(mContext) && hasSufficientPermission(mContext)
                 ? AVAILABLE : DISABLED_DEPENDENT_SETTING;
     }
 
     @Override
     public boolean isChecked() {
-        return Settings.Secure.getInt(mContext.getContentResolver(),
+        return hasSufficientPermission(mContext) && Settings.Secure.getInt(
+                mContext.getContentResolver(),
                 CAMERA_AUTOROTATE, 0) == 1;
     }
 
@@ -62,4 +72,24 @@ public class SmartAutoRotateController extends TogglePreferenceController implem
                 isChecked ? 1 : 0);
         return true;
     }
+
+    static boolean isRotationResolverServiceAvailable(Context context) {
+        final PackageManager packageManager = context.getPackageManager();
+        final String resolvePackage = packageManager.getRotationResolverPackageName();
+        if (TextUtils.isEmpty(resolvePackage)) {
+            return false;
+        }
+        final Intent intent = new Intent(RotationResolverService.SERVICE_INTERFACE).setPackage(
+                resolvePackage);
+        final ResolveInfo resolveInfo = packageManager.resolveService(intent,
+                PackageManager.MATCH_SYSTEM_ONLY);
+        return resolveInfo != null && resolveInfo.serviceInfo != null;
+    }
+
+    static boolean hasSufficientPermission(Context context) {
+        final PackageManager packageManager = context.getPackageManager();
+        final String rotationPackage = packageManager.getRotationResolverPackageName();
+        return rotationPackage != null && packageManager.checkPermission(
+                Manifest.permission.CAMERA, rotationPackage) == PackageManager.PERMISSION_GRANTED;
+    }
 }