Fixes to title bar using top controls

- Do not differentiate between title bar in fixed vs auto-hide mode
  using different android layouts. Use top controls to always show
  titlebar for fixed titlebar.
- Always show the titlebar when page is being loaded even if the user
  scrolls during the page load.
- Fixes the jankiness seen in fixed titlebar mode when user navigates
  between webpages.
- Reaffirm top controls when user switches between fixed and auto-hide
  titlebar mode.

Change-Id: I2531695f34e725ae444f6159645c7557dec69fab
2 files changed