Revert "Show number of devices connected to the WiFi hotspot in notification"

This reverts commit 245afa0b602573a915369131700be79e8505bdb8.
User defined wifi/usb tether network. [1/2]

Change-Id: I1989c5332ba598a04094b03d6a5de32d72f7fa1c
framework: Show devices connected to the WiFi hotspot (2/2)

Change-Id: I82af20fe8368f7901e647491769e9b4b9b37e9fc

Conflicts:
	core/res/res/values/symbols.xml
	services/java/com/android/server/connectivity/Tethering.java
clean up