[FIX] Fixes bottom sheets not being scrollable and completely visible

[hfeky]

@RocketChat/android

Closes #2253
Closes #2277

Changes:

1. Fixed bottom sheets not being scrollable when the sheet is too long for the device screen. Initially one could not scroll.
2. Fixed bottom sheets not being completely visible when the sheet is too long for the device screen.
3. Fixed hardcoded string "+99" in ChatRoomFragment.
4. Corrected 2 translations in Arabic language.

GIFs for the change:

Portrait:

Landscape:

[philipbrito]

@HusseinElFeky Are you using the 3.4.1 app version and facing the blank chat list issue?

[hfeky]

@filipedelimabrito Unfortunately yes, tried 3.4.1 on Play Store and 3.4.1 (latest commit) from here, on open.rocket.chat server, and no chats are showing. However there is a sneaky temporary workaround that I do to be able to chat with users. This only works for users, not channels. If you go to Directory, search for any user, and click on him, a toast will show, saying "Expected END_ARRAY but was END_OBJECT at path $.update[8].lastMessage". It will not open the chat, but if you return to the main chats list, the user you clicked on earlier will appear, and now you can chat with him. I can send you a GIF, showing that if you want. Also if by any way you need help with testing, I can help you.

Update: I have sent you a GIF, demonstrating that issue in a DM on Rocket.Chat.

[philipbrito]

Thank you @HusseinElFeky!
👏 👏