[IMPROVEMENT] Change ImagePipelineConfig initialization in Dagger graph

[IMPROVEMENT] Change OkHttpClient initialization in Dagger graph

[CHORE] Update constraintLayout to version 1.1.0

[IMPROVEMENT] Use the same UI interaction between Pinned & Members list 

[I18N] Correct grammar in sign in title

[FIX] Show real name instead of username on chat list

Rather than using the Kotlin apply function, directly invoke the builder methods on the OkHttpClient.Builder instance. This produces noticeably better bytecode and the apply function does not add value in this case.

Rather than creating a new, unsized HashSet, use idiomatic Kotlin to create the set of RequestListeners for the ImagePipelineConfig. Under the hood a SingletonSet will be used which is optimized for the current use case, but if additional Listeners are added, the collections will automatically be sized appropriately. This leads to better memory utilization and reduced CPU usage.

merge

[NEW] Implement save image to gallery

[FIX] Use username when building replies always (update)

[NEW] Forgot password

MessageParser as non-singleton since the server settings changes when
swapping between multiple servers.

merge

[NEW] Add GenericFileAttachment

Merge branch 'new/generic-file-attachment' of github.com:RocketChat/Rocket.Chat.Android into new/generic-file-attachment

[NEW] No chat message shown on empty chat list

[FIX] Use username when building replies always

[NEW] Support to login using Custom OAuth