Fix overlapping tool bar and action bar in groups view

When the group action is removing a member from the group
call switchToOrUpdateGroupView so it uses the previous instance.
We need to remember that the fragment was in edit mode.

Test: Checked removing a contact from label using the delete icon
  * Shows the correct toast
  * Updates the list
  * Doesn't show overlapping bars
  * Allows the user to continue deleting contacts.
Also checked correct behavior for:
  * Multiselect removals
  * Multiselect additions
  * Renaming the label

Bug: 32431977

Change-Id: I5597cc5e0ca0a5e0a54dfc3180352fbb90d403d9