Prevent committing session while in progress

Committing a session twice in a row will result in interleaved
verification flows and break the internal states.

Add a field to prevent committing again while the installation
is already in progress.

Bug: 256330705
Test: presubmit
Change-Id: I1f5a90acde1874b3efbe4dad55f366e991bb4a21
Merged-In: I1f5a90acde1874b3efbe4dad55f366e991bb4a21
1 file changed