[Tizen] Thiner scrollbar on Tizen

Tizen needs a thin scroll indicator which is slightly offset from the right viewport edge.
Merge pull request #3 from pozdnyakov/thin_scrollbar

[Tizen] Thiner scrollbar on Tizen
[Android] Enable Web Audio on x86 -- part 2

1. Open the flag of web audio on Android x86.
2. Add x86 header in FFTFrame.h.
3. Remove some useless code.