Merge "Allow internal services access to instant apps" into oc-mr1-dev

     * <p>

     * Currently, there are three cases in which this can occur:

     * <ol>

     * <li>The calling application is a "special" process. The special

     *     processes are {@link Process#SYSTEM_UID}, {@link Process#SHELL_UID}

     *     and {@code 0}</li>

     * <li>The calling application is a "special" process. Special processes

     *     are those with a UID < {@link Process#FIRST_APPLICATION_UID}.</li>

     * <li>The calling application has the permission

     *     {@link android.Manifest.permission#ACCESS_INSTANT_APPS}</li>

     *     {@link android.Manifest.permission#ACCESS_INSTANT_APPS}.</li>

     * <li>The calling application is the default launcher on the

     *     system partition.</li>

     * </ol>

     */

    private boolean canViewInstantApps(int callingUid, int userId) {

        if (callingUid == Process.SYSTEM_UID

                || callingUid == Process.SHELL_UID

                || callingUid == Process.ROOT_UID) {

        if (callingUid < Process.FIRST_APPLICATION_UID) {

            return true;

        }

        if (mContext.checkCallingOrSelfPermission(