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When the device is physically used as a tablet (e.g. detached or
flipped), the keyboard shortcut to rotate the display should
behave as a request to lock the user orientation to the next
rotation of the internal display.

App windows are allowed to lock the rotation to a particular
orientation in tablet UI mode on the internal display only.
In this case, the shortcut should switch between the allowed
rotations if any, or do nothing.

For example:
- If a window locks the rotation to kPortrait, the shortcut should
  switch the user rotation lock between kPortriatPrimary and
  kPortraitSecondary.
- If a window locks the rotation to kPortraitSecondary, then the
  shortcut should do nothing.

BUG=925087, 1026398
TEST=Manually, Added a new test.

Change-Id: I34bf76a336ef81de4f1f5269843a3dd8c5efcd4a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1892054
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721293}