Remove the Canonical Address Database

This was a holdover from Signal's origins as a pure SMS app.
It causes problems, depends on undefined device specific behavior,
and should no longer be necessary now that we have all the
information we need to E164 all numbers.

// FREEBIE

build.gradle

@@ -203,7 +203,7 @@ android {
     }
 
     defaultConfig {
-        versionCode 275
+        versionCode 276
         versionName "4.8.1"
 
         minSdkVersion 9