[1/2] Fix resize frame showing at left top corner of workspace.

Some widget will show config activity and immediately dismiss it after user dropping widget onto workspace. This lead to 2 code paths triggered around same time:

1. Drop widget to workspace and show resize frame, after state is transitiion to NORMAL, show workspace
2. Close config activity and Launcher#onActivityResult, which triggers removing dropped widget and extract bitmap, then re-inflate another pending widget and show resize frame

Due to race condition between #1 and #2, we might remove the dropped widget first in #2, then show resize frame in #1 after workspace is transitione to NORMAL, leading showing resize frame at incorrect location

Next CL will fix the slight misalignment of resize frame with widget.

Bug: 331433240
Flag: NONE
Test: manual
Change-Id: Ie02f59b370271d517ed2e91b42d665f44a86095b