Reword analog audio not supported notification

New title: Analog audio accessory detected
New message: The attached device is not compatible with this
phone. Tap to learn more.

Also switch to bigTextStyle as the notification message
takes more than one line to display.

Bug: 63962800
Test: Attached analog audio accessory to verify the notification
manually. Also verified that the charging notification remians
untouched.
Change-Id: I5c395bdf3c3dd11f3be8835ec773f087afdc85d9