Log screen events for blocked call fragments

* Add blocked number screen types to Logger
* Log screen views for SearchFragments in DialtactsActivity
rather than in onStart, to avoid double logging for some
fragments (e.g. children of RegularSearchFragment)
* Log screen view for call log context menu (where the block
number action appears

Bug: 25288435
Change-Id: I4ebf1410f93afb37d20be2cc57f933e5d635cfb6
diff --git a/src/com/android/dialer/DialtactsActivity.java b/src/com/android/dialer/DialtactsActivity.java
index cc457bd..6de1fdc 100644
--- a/src/com/android/dialer/DialtactsActivity.java
+++ b/src/com/android/dialer/DialtactsActivity.java
@@ -1053,6 +1053,12 @@
             mListsFragment.getView().animate().alpha(0).withLayer();
         }
         mListsFragment.setUserVisibleHint(false);
+
+        if (smartDialSearch) {
+            Logger.logScreenView(ScreenEvent.SMART_DIAL_SEARCH, this);
+        } else {
+            Logger.logScreenView(ScreenEvent.REGULAR_SEARCH, this);
+        }
     }
 
     /**