Fixing model being updated on UI thread

> When package gets unavailable or suspended, the disabled flag was getting
updated on the UI thread. This could lead to inconsistent model if launcher
activity didn't exist.
> Fixing: When unsuspending one work profile apps, all work profile apps get
unsuspended

Bug: 27673573,27673373,27403236
Change-Id: I7fde3f79c36204e73ca66ccf8431fa0f0cce3d08