Show number of devices connected to the WiFi hotspot in notification

Change-Id: I8378e0ae07332f62b92a1681951f1236f6ef5ff9

Conflicts:
	core/res/res/values/symbols.xml
base: fix volumen panel traslucent after stream icon click

Change-Id: I290ecb07106198882739a5b734f4d6a89d3eb5fb
JIRA: CYAN-4487
Issue: https://jira.cyanogenmod.org/browse/CYAN-4487
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>