Display in Notifications settings the default mode for the group and the direct chats

[giomfo]

Description

Add in the notifications settings a section "Notify me for" to provide the default setting for group chats and direct chats.

The default value for group chats depends on 2 Underride rules: .m.rule.message and .m.rule.encrypted. We will consider only their enabled attribute:

• if both are enabled -> "All Messages"
• if both are disabled -> "Mentions and Keywords"
• if only one is enabled -> display a banner to let user know the configuration is not supported. A button is available to fix the pb. In that case, we enabled the second one to fix the pb.

The default value for group chats depends on 2 Underride rules: .m.rule.encrypted_room_one_to_one and .m.rule.room_one_to_one. We will consider only their enabled attribute:

• if both are enabled -> "All Messages"
• if both are disabled -> "Mentions and Keywords"
• if only one is enabled -> display a banner to let user know the configuration is not supported. A button is available to fix the pb. In that case, we enabled the second one to fix the pb.

Suggested Design

[giomfo]

About the "banner" displayed when the config is not supported, the discussion took place in the related iOS issue here.

@amshakal can you please provide an Android version of the design for this "banner/alert"?

[giomfo]

@yostyle Do you agree with @amshakal that the option4 is the best?

FYI here is my last wording suggestion

[giomfo]

#1037 implement this issue without handling the potential unsupported configuration.
FYI option3 has been the one selected for iOS (see with @nimau for more details)