manually including the im.dlg:android-dialer:1.2.5

- avoids using appcompat
- avoids using an artifact without a source repository

settings.gradle

@@ -9,4 +9,5 @@ include ':library:jsonviewer'
 include ':library:attachment-viewer'
 include ':library:diff-match-patch'
 include ':library:multipicker'
+include ':library:dialpad'
 include ':matrix-sdk-android-flow'