Rename "Recents" to "Call History".

+ All user-facing indications should now say "Call History".
+ I renamed many references in code to "Call Log", which is how
we internally refer to many of the components related to call
history. It seemed excessive to rename the fragment, list items,
adapters, and other references to that throughout our codebase.

Bug: 23017190
Change-Id: I99719122ce592962ff99705dcf4b16e17eee3ab7
diff --git a/res/layout/voicemail_playback_layout.xml b/res/layout/voicemail_playback_layout.xml
index 56865fc..555d201 100644
--- a/res/layout/voicemail_playback_layout.xml
+++ b/res/layout/voicemail_playback_layout.xml
@@ -94,7 +94,7 @@
                     style="@style/VoicemailPlaybackLayoutButtonStyle"
                     android:src="@drawable/ic_delete_24dp"
                     android:tint="@color/voicemail_icon_tint"
-                    android:contentDescription="@string/recentCalls_trashVoicemail" />
+                    android:contentDescription="@string/call_log_trash_voicemail" />
 
             </LinearLayout>