Revert "Change default for group alert behavior"

This reverts commit 8f7828ebe7fc6d87e0de112cfda2823fd5818cb2.

Mutes sound on legacy apps that use their summaries to make sound

Change-Id: I635b1428ee247c0b7753f58343637e64da1c981d

Fixes: 62387153
1 file changed