afohrman 2eb1f951fc Add feedback when character counter limit is exceeded.
This commit adds feedback once the character counter limit is exceeded (ex: 11/10), and backs off for every other case to avoid spamming the user.

Also adds a content description with a detailed message to the counter view to make it clear what the overflow is.

PiperOrigin-RevId: 193397006
2018-04-30 11:31:45 -04:00
..