Merge "Wait for all windows to draw before turning screen on" into klp-modular-dev

        public void waitForAllWindowsDrawn(IRemoteCallback callback, long timeout) {

            synchronized (mWindowMap) {

                mWaitingForDrawnCallback = callback;

                final WindowList windows = getDefaultWindowListLocked();

                for (int displayNdx = mDisplayContents.size() - 1; displayNdx >= 0; --displayNdx) {

                    final WindowList windows =

                            mDisplayContents.valueAt(displayNdx).getWindowList();

                    for (int winNdx = windows.size() - 1; winNdx >= 0; --winNdx) {

                        final WindowState win = windows.get(winNdx);

                        if (win.mHasSurface) {

                            win.mWinAnimator.mDrawState = WindowStateAnimator.DRAW_PENDING;

                            // Force add to mResizingWindows.

                            win.mLastContentInsets.set(-1, -1, -1, -1);

                            if (DEBUG_SCREEN_ON) Slog.d(TAG, "waitForAllWindowsDrawn: adding " +

                                    win);

                            mWaitingForDrawn.add(win);

                        }

                    }

                }

                requestTraversalLocked();

                mH.removeMessages(H.WAITING_FOR_DRAWN_TIMEOUT);

                mH.sendEmptyMessageDelayed(H.WAITING_FOR_DRAWN_TIMEOUT, timeout);