Fix toolbar keyboard navigation and touch.

- toolbar default has touchscreenBlocksFocus enabled which make toolbar not focusable when touch screen present. Explicitly set touchscreenBlocksFocus to false make the toolbar can be focus when keyboard navigation.
- Remove focusableInTouchMode which breaks normal touch control. Read https://android-developers.googleblog.com/2008/12/touch-mode.html for more details.

Fix: 327025582
Fix: 324420544
Test: manual test with keyboard and touch navigation

Change-Id: I6cad869e3a51926405a6f3ae894daa5416050bf8

src/com/android/settings/search/SearchFeatureProvider.java

@@ -100,6 +100,7 @@ public interface SearchFeatureProvider {
         // and goes to the search UI. Also set the background to null so there's no ripple.
         final View navView = toolbar.getNavigationView();
         navView.setClickable(false);
+        navView.setFocusable(false);
         navView.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO);
         navView.setBackground(null);