Merge "Layer input method on top while transitioning." into pi-dev am: e47deaca

        // we use relative layering of the IME targets child windows, and place the

        // IME in the non-app layer (see {@link AboveAppWindowContainers#assignChildLayers}).

        //

        // In the case the IME target is animating, the animation Z order may be different

        // than the WindowContainer Z order, so it's difficult to be sure we have the correct

        // IME target. In this case we just layer the IME over all transitions by placing it in the

        // above applications layer.

        //

        // In the case where we have no IME target we assign it where it's base layer would

        // place it in the AboveAppWindowContainers.

        if (imeTarget != null && !imeTarget.inSplitScreenWindowingMode()

        if (imeTarget != null && !(imeTarget.inSplitScreenWindowingMode()

                || imeTarget.mToken.isAppAnimating())

                && (imeTarget.getSurfaceControl() != null)) {

            mImeWindowsContainers.assignRelativeLayer(t, imeTarget.getSurfaceControl(),

                    // TODO: We need to use an extra level on the app surface to ensure