Sort frequently contacted on lookup URI

app/src/main/java/eu/faircode/email/DB.java

@@ -50,7 +50,7 @@ import io.requery.android.database.sqlite.RequerySQLiteOpenHelperFactory;
 // https://developer.android.com/topic/libraries/architecture/room.html
 
 @Database(
-        version = 58,
+        version = 59,
         entities = {
                 EntityIdentity.class,
                 EntityAccount.class,
@@ -648,6 +648,13 @@ public abstract class DB extends RoomDatabase {
                         db.execSQL("CREATE  INDEX `index_contact_state` ON `contact` (`state`)");
                     }
                 })
+                .addMigrations(new Migration(58, 59) {
+                    @Override
+                    public void migrate(SupportSQLiteDatabase db) {
+                        Log.i("DB migration from version " + startVersion + " to " + endVersion);
+                        db.execSQL("CREATE  INDEX `index_contact_avatar` ON `contact` (`avatar`)");
+                    }
+                })
                 .build();
     }
 

app/src/main/java/eu/faircode/email/DaoContact.java

@@ -45,6 +45,7 @@ public interface DaoContact {
             " WHERE state <> " + EntityContact.STATE_IGNORE +
             " ORDER BY" +
             " CASE WHEN state = " + EntityContact.STATE_FAVORITE + " THEN 0 ELSE 1 END" +
+            ", CASE WHEN avatar IS NULL THEN 1 ELSE 0 END" +
             ", times_contacted DESC" +
             ", last_contacted DESC" +
             " LIMIT :count")

app/src/main/java/eu/faircode/email/EntityContact.java

@@ -45,6 +45,7 @@ import static androidx.room.ForeignKey.CASCADE;
                 @Index(value = {"account", "type", "email"}, unique = true),
                 @Index(value = {"email"}),
                 @Index(value = {"name"}),
+                @Index(value = {"avatar"}),
                 @Index(value = {"times_contacted"}),
                 @Index(value = {"last_contacted"}),
                 @Index(value = {"state"})