Fix off-center bubble pointer

Bubble position is calculated w.r.t left screen edge.
Pointer position is set w.r.t right end of expanded view left padding.
Add missing correction for expanded view left padding.

Fixes: 158621663
Test: pointer points to bubble center
Change-Id: I94d320b0b599865378d8297d50f555d5edd07203
1 file changed