Log ContentProvider operations to the EventLog.

Just like with db_operation, operations over 100ms are always logged,
while operations under that are subsampled.

This will help with performance analysis, getting real-world
performance numbers from dogfooders.
diff --git a/Android.mk b/Android.mk
index ec6f96b..eb84785 100644
--- a/Android.mk
+++ b/Android.mk
@@ -33,6 +33,9 @@
 # FRAMEWORKS_BASE_SUBDIRS comes from build/core/pathmap.mk
 LOCAL_SRC_FILES := $(call find-other-java-files,$(FRAMEWORKS_BASE_SUBDIRS))
 
+# EventLogTags files.
+LOCAL_SRC_FILES += core/java/android/content/EventLogTags.logtags
+
 # The following filters out code we are temporarily not including at all.
 # TODO: Move AWT and beans (and associated harmony code) back into libcore.
 # TODO: Maybe remove javax.microedition entirely?