SnapdragonCamera: Add SettingsManager, scene, and filter

Add SettingsManager to work as a database for settings.
It will handle all dependencies and populate the values.
Add scene mode and filter.
Restructure UI and menu by combining them and leave the
handling of settings to SettingsManager

Change-Id: I185163fdddbffd29434e6a9c41b33be6d3388f88
CRs-Fixed: 1018118
28 files changed