Guard against ApiException in EditSectionActivity.

Some users are getting crashes when editing sections, probably due to
intermittent problems with their connection. This patch should allow stop the
app from crashing and allow them to retry making the edit.

Bug: 71332
Change-Id: I060bd1b9413a82b789290c46e0c0b8f1b4803b8b
Merge "Guard against ApiException in EditSectionActivity."