Fix taskbar hotseat alignment

- Use hotseatBorderSpace instead of cellLayoutBorderSpace
- Also divide by 2f instead of 2 because AS was complaining. May or may not potentially address off by 1 pixel issues.

Test: locally set alignment = 1, ensure perfectly aligned
Fixes: 218880076
Change-Id: Ifec30e6727f62985427b65b6c0b0810e7f7cd695
1 file changed