Merge "[PB] Pilfer pointers if no focus window." into main

    @VisibleForTesting

    public void onThresholdCrossed() {

        mThresholdCrossed = true;

        // There was no focus window when calling startBackNavigation, still pilfer pointers so

        // the next focus window won't receive motion events.

        if (mBackNavigationInfo == null) {

            tryPilferPointers();

            return;

        }

        // Dispatch onBackStarted, only to app callbacks.

        // System callbacks will receive onBackStarted when the remote animation starts.

        final boolean shouldDispatchToAnimator = shouldDispatchToAnimator();

        if (backNavigationInfo == null) {

            ProtoLog.e(WM_SHELL_BACK_PREVIEW, "Received BackNavigationInfo is null.");

            cancelLatencyTracking();

            tryPilferPointers();

            return;

        }

        final int backType = backNavigationInfo.getType();