Adjust version to 2.9.1

:Release Notes:
Increase version to 2.9.1

:Detailed Notes:

:Testing Performed:
Build and unit tests

:QA Notes:

:Issues Addressed:
[BHV-12121] SmartShare application doesn't support -1/2x rewind

Open-webOS-DCO-1.0-Signed-off-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>

Change-Id: I3cd55c59625f82aae445e247708b73128433b5c5