Merge "Handle back shortcuts in native and remove home shortcut handling" into udc-dev

/**

 * If one of the meta shortcuts is detected, process them here:

 *     Meta + Backspace -> generate BACK

 *     Meta + Enter -> generate HOME

 * This will potentially overwrite keyCode and metaState.

 *     Meta + Backspace; Meta + Grave; Meta + Left arrow -> generate BACK

 * Most System shortcuts are handled in PhoneWindowManager.java except 'Back' shortcuts. Unlike

 * Back, other shortcuts DO NOT need to be sent to applications and are fully handled by the system.

 * But for Back key and Back shortcuts, we need to send KEYCODE_BACK to applications which can

 * potentially handle the back key presses.

 * Note: We don't send any Meta based KeyEvents to applications, so we need to convert to a KeyEvent

 * where meta modifier is off before sending. Currently only use case is 'Back'.

 */

void InputDispatcher::accelerateMetaShortcuts(const int32_t deviceId, const int32_t action,

                                              int32_t& keyCode, int32_t& metaState) {

    if (metaState & AMETA_META_ON && action == AKEY_EVENT_ACTION_DOWN) {

        int32_t newKeyCode = AKEYCODE_UNKNOWN;

        if (keyCode == AKEYCODE_DEL) {

        if (keyCode == AKEYCODE_DEL || keyCode == AKEYCODE_GRAVE || keyCode == AKEYCODE_DPAD_LEFT) {

            newKeyCode = AKEYCODE_BACK;

        } else if (keyCode == AKEYCODE_ENTER) {

            newKeyCode = AKEYCODE_HOME;

        }

        if (newKeyCode != AKEYCODE_UNKNOWN) {

            std::scoped_lock _l(mLock);