presto: add standalone app Advanced Settings

only earpiece volume gain feature implemented at the moment

Change-Id: I2bcd74e4fa0b7be7d10d3ab544cf9fa14b617443
AdvancedSettings: build fix; new icon;

Change-Id: I5567197b956ebab5246a6a0bde20492f5337eeec
av: camera: Generic QCOM camera symbols

 * Several symbols declared Oppo specific are QCOM generic

Change-Id: I0a1b5742d8e4d08963cbd43e69c87609eef45b59
wifi: switch from wext to nl80211 driver

Change-Id: I3851a6be6510ab9057f9467005c318f2f9575a59