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
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:9b63fbb772c0d6855f2bc4ddd79e9303102bdcd8)
Merged-In: I6cad869e3a51926405a6f3ae894daa5416050bf8
Change-Id: I6cad869e3a51926405a6f3ae894daa5416050bf8