Merge "Fail nicely in Activity.requestPermissions when requestCode < 0"

     *    reported to {@link #onRequestPermissionsResult(int, String[], int[])}.

     *    Should be >= 0.

     *

     * @throws IllegalArgumentException if requestCode is negative.

     *

     * @see #onRequestPermissionsResult(int, String[], int[])

     * @see #checkSelfPermission(String)

     * @see #shouldShowRequestPermissionRationale(String)

     */

    public final void requestPermissions(@NonNull String[] permissions, int requestCode) {

        if (requestCode < 0) {

            throw new IllegalArgumentException("requestCode should be >= 0");

        }

        if (mHasCurrentPermissionsRequest) {

            Log.w(TAG, "Can reqeust only one set of permissions at a time");

            // Dispatch the callback with empty arrays which means a cancellation.