Expose getTouchlessUiCoordinator from ChromeActivity

To be used by a downstream followup patch.

Bug: 974244
Change-Id: If225088e5dcd5401eeba4717b06702a36319efc6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1659981Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#669681}

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

@@ -2602,7 +2602,7 @@ public abstract class ChromeActivity<C extends ChromeActivityComponent>
      * need to make sure it gets initialized early on regardless of whether somebody tries to use it
      * as it monitors Lifecycles, etc.
      */
-    private TouchlessUiCoordinator getTouchlessUiCoordinator() {
+    public TouchlessUiCoordinator getTouchlessUiCoordinator() {
         if (mTouchlessUiCoordinator == null && FeatureUtilities.isNoTouchModeEnabled()) {
             mTouchlessUiCoordinator = AppHooks.get().createTouchlessUiCoordinator(this);
         }