Fix exploit where can hide the fact that a location was mocked

import android.os.UserHandle;

import android.os.WorkSource;

import android.provider.Settings;

import android.text.TextUtils;

import android.util.EventLog;

import android.util.Log;

import android.util.Slog;

import com.android.internal.content.PackageMonitor;

            if (mockProvider == null) {

                throw new IllegalArgumentException("Provider \"" + provider + "\" unknown");

            }

            // Ensure that the location is marked as being mock. There's some logic to do this in

            // handleLocationChanged(), but it fails if loc has the wrong provider (bug 33091107).

            Location mock = new Location(loc);

            mock.setIsFromMockProvider(true);

            if (!TextUtils.isEmpty(loc.getProvider()) && !provider.equals(loc.getProvider())) {

                // The location has an explicit provider that is different from the mock provider

                // name. The caller may be trying to fool us via bug 33091107.

                EventLog.writeEvent(0x534e4554, "33091107", Binder.getCallingUid(),

                        provider + "!=" + loc.getProvider());

            }

            // clear calling identity so INSTALL_LOCATION_PROVIDER permission is not required

            long identity = Binder.clearCallingIdentity();

            mockProvider.setLocation(loc);

            mockProvider.setLocation(mock);

            Binder.restoreCallingIdentity(identity);

        }

    }