Zom Android 15.1.0-beta-2

91b9bf5 improve display and logic of approve friend
a860961 disable debug
8f71947 make sure to remove connectino when you delete an account
1cdcd40 additional small fixes for subscription management
c71a88b make sure we are always specifying the right ImConnection instance
f7e171b improve subscription notifications and connection requests
961f949 add support for #235 "waiting" and other add friend improvements
056441d tweaks to help with Monlam font users
1ba8fbe a few small tweaks to account upgrade process
5172c8c show the full account username in the list
4638ea2 in some cases, the contact will be null, as it not existed yet
0514bd5 catch an error in omemo pubsub on some servers
4d94168 change placeholder text of account items