Update prebuilt submodule pointer.
[[ Bug 13621 ]] Make sure we explicitly request access to contacts when using mobile Add/Remove/Find contact
[[ Bug 13621 ]] Removed unused code
[[ Bug 12464 ]] The effective screenrect returns incorrect values when hiding/showing keyboard on iOS.
Merge remote-tracking branch 'michael/bugfix-12464' into bugfix-12464
Merge remote-tracking branch 'panos/bugfix-13621' into bugfix-13621
Merge branch 'bugfix-12464' into release-6.6.4
Merge branch 'bugfix-13621' into release-6.6.4