Additional System APIs for restricted profiles

- isRestrictedProfile - whether the caller is running
  as restricted profile.
- hasRestrictedProfiles - whether the calling user has at least one
  restricted profile associated with it.

Bug: 64122169
Test: UserManagerTest
Change-Id: I178b02a48abc32e126613e0320c4950f455364df
diff --git a/services/core/java/com/android/server/pm/UserManagerService.java b/services/core/java/com/android/server/pm/UserManagerService.java
index 1e5245c..1152310 100644
--- a/services/core/java/com/android/server/pm/UserManagerService.java
+++ b/services/core/java/com/android/server/pm/UserManagerService.java
@@ -1010,6 +1010,23 @@
         }
     }
 
+    @Override
+    public boolean hasRestrictedProfiles() {
+        checkManageUsersPermission("hasRestrictedProfiles");
+        final int callingUserId = UserHandle.getCallingUserId();
+        synchronized (mUsersLock) {
+            final int userSize = mUsers.size();
+            for (int i = 0; i < userSize; i++) {
+                UserInfo profile = mUsers.valueAt(i).info;
+                if (callingUserId != profile.id
+                        && profile.restrictedProfileParentId == callingUserId) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+
     /*
      * Should be locked on mUsers before calling this.
      */
diff --git a/services/tests/servicestests/src/com/android/server/pm/UserManagerTest.java b/services/tests/servicestests/src/com/android/server/pm/UserManagerTest.java
index b656d5e..dd9a8ab 100644
--- a/services/tests/servicestests/src/com/android/server/pm/UserManagerTest.java
+++ b/services/tests/servicestests/src/com/android/server/pm/UserManagerTest.java
@@ -309,6 +309,8 @@
 
     @MediumTest
     public void testAddRestrictedProfile() throws Exception {
+        assertFalse("There should be no associated restricted profiles before the test",
+                mUserManager.hasRestrictedProfiles());
         UserInfo userInfo = createRestrictedProfile("Profile");
         assertNotNull(userInfo);
 
@@ -324,6 +326,9 @@
                 userInfo.id);
         assertEquals("Restricted profile should have setting LOCATION_MODE set to "
                 + "LOCATION_MODE_OFF by default", locationMode, Settings.Secure.LOCATION_MODE_OFF);
+
+        assertTrue("Newly created profile should be associated with the current user",
+                mUserManager.hasRestrictedProfiles());
     }
 
     @MediumTest