[Touchless] Fix issue with progressbar visibility

This makes the progressbar invisible by default which prevents it from
showing on startup.

Bug: 959227
Change-Id: I710d2409f80ba4ec85a16e4c9cbc5e631c056eee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1595983
Auto-Submit: Mehran Mahmoudi <mahmoudi@chromium.org>
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Commit-Queue: Mehran Mahmoudi <mahmoudi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#657369}

chrome/android/touchless/java/src/org/chromium/chrome/browser/touchless/ui/progressbar/ProgressBarView.java

@@ -51,6 +51,7 @@ public class ProgressBarView extends RelativeLayout {
         mUrlTextView = findViewById(R.id.notouch_url_text_view);
 
         mProgressBar.setMax(MAX_PROGRESS);
+        setVisibility(false);
     }
 
     void setProgress(float progressFraction) {