Revert "Stats: track how frequently contact images are present incall"

This reverts commit 36e6ee373e4cbe86cf349edb1b897f23ea8bc3f1.

Conflicts:
	src/com/android/incallui/ContactInfoCache.java

Change-Id: I2124c4144a3e03cdacaad5ab93a3f322f856d8d0