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The switch resolution race is caused by logic of enabling switching
options right after STREAMING ready and before camera configuration
finishing. This CL fix the race by introducing new CAMERA_CONFIGURING
state will be flagged during the camera stream reconfiguration process.

Bug: b/147567355
Test: Manually test clicking on the resolution options when it's
clickable and won't jump back to previous option after clicked.

Change-Id: I32153ff78bc1bc6a3478225479e289e5617851a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2082665Reviewed-by: Shik Chen <shik@chromium.org>
Reviewed-by: Wei Lee <wtlee@chromium.org>
Commit-Queue: Kuo Jen Wei <inker@chromium.org>
Auto-Submit: Kuo Jen Wei <inker@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748148}