Merge "Fix crash: NPE in SuggestionStripView in LatinIME" into main am: 94b9391 am: d4249b4

Original change: https://android-review.googlesource.com/c/platform/packages/inputmethods/LatinIME/+/3405839

Change-Id: I75c12ee7e71c973ee749ee54010639a13ba7bda1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

Author: Ziqi Chen

java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java

@@ -343,6 +343,9 @@ boolean showMoreSuggestions() {
             new GestureDetector.SimpleOnGestureListener() {
         @Override
         public boolean onScroll(MotionEvent down, MotionEvent me, float deltaX, float deltaY) {
+            if (down == null) {
+                return false;
+            }
             final float dy = me.getY() - down.getY();
             if (deltaY > 0 && dy < 0) {
                 return showMoreSuggestions();