Throw when taking non-existant Uri permission.

            final int callingUid = Binder.getCallingUid();

            final UriPermission perm = findUriPermissionLocked(callingUid, uri);

            if (perm == null) {

                Slog.w(TAG, "No permission grant found for UID " + callingUid + " and Uri "

                        + uri.toSafeString());

                return;

                throw new SecurityException("No permission grant found for UID " + callingUid

                        + " and Uri " + uri.toSafeString());

            }

            boolean persistChanged = perm.takePersistableModes(modeFlags);

import android.os.UserHandle;

import android.util.Log;

import com.android.internal.util.Preconditions;

import com.google.android.collect.Sets;

import java.io.PrintWriter;

     * @return if mode changes should trigger persisting.

     */

    boolean takePersistableModes(int modeFlags) {

        Preconditions.checkFlagsArgument(modeFlags, persistableModeFlags);

        if ((modeFlags & persistableModeFlags) != modeFlags) {

            throw new SecurityException("Requested flags 0x"

                    + Integer.toHexString(modeFlags) + ", but only 0x"

                    + Integer.toHexString(persistableModeFlags) + " are allowed");

        }

        final int before = persistedModeFlags;

        persistedModeFlags |= (persistableModeFlags & modeFlags);