Wi-Fi: Manage Wi-Fi AP priorities

AOSP has a basic LRU priority for Wi-Fi networks (last connected has more priority).
This changes added the ability of graphically set the priority of any of the configured
Wi-Fi networks through Settings -> Wi-Fi -> Advanced Settings -> Wi-Fi priority.

Patchset 2: Move WiFiPriority from cyanogenmod folder to wifi folder
            Remove double quotes in SSID name
Patchset 3: Fixed code issues

Change-Id: Ief590e799cdb7ef760b631d0b22d9719f867393f
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Reword power sounds to power connectivity alert.

Not just sounds since it vibrates!  Verbosity is best.

Change-Id: Ifaf221991e92db0f9799f5843b3aca062bf98a18

Conflicts:
	res/values/strings.xml
	res/xml/sound_settings_rom.xml