InCallUI : Update volume boost UI icon

Update volume boost UI new icon.

Change-Id: I3474504c64d0547aa7f6ed411b293e0d28a7a7e4
InCallUI : volume boost unexpected turn off

Fix the volume boost unexpected turn off when hold phone or Call status
changed.

CRs-Fixed: 601169

Change-Id: I32370189e1e4cdcb975df756f48d683752dc619c