Cancel Old SpeedDial contact loaders when they are reset.

This prevents to many loaders running at the same time and crashing the
application for using too many threads at once.

Also made a few UI changes:
 - Change Android nav bar color to #FFF
 - Move badges down 2dp
 - Limit badges to 9+ (instead of 99+, added flag to configure this)
 - search bar no longer has rounded corners when expanded

Bug: 72525324
Test: MainActivityOldPeerTest
PiperOrigin-RevId: 186894920
Change-Id: I36fc5d8794440b707184d54de427db5910ec5b8e