Remove taps to become a developer

Developer settings are enabled by default, so having this "feature"
in the Settings app is pointless and annoying. Remove it to improve
the UX.

Change-Id: I34919c811b04197b95ac71233827cf8f66ef7087

Conflicts:
	src/com/android/settings/DeviceInfoSettings.java
Enable Developer options by default

Change-Id: I2cfc1b2d0e918f5df3ee6b794084caf67b44de41