refactor: Use view binding to replace Kotlin synthetics (#824)

* refactor: Migrate home screen to data binding

* Add view binding

* Migrate ConversationView to view binding

* Migrate ConversationActivityV2 to view binding

* View model refactor

* Move more functionality to the view model

* Add ui state events flow

* Update conversation item bindings

* Update profile picture view bindings

* Replace Kotlin synthetics with view bindings

* Fix qr code fragment binding and optimize imports

* View binding refactors

* Make TextSecurePreferences an interface and add an implementation to improve testability

* Add conversation repository

* Migrate remaining TextSecurePreferences functions into the interface

* Add unit conversation unit tests

* Add unit test coverage for remaining view model functions

build.gradle

@@ -4,9 +4,9 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.3'
+        classpath 'com.android.tools.build:gradle:4.2.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
-        classpath "com.google.gms:google-services:4.3.4"
+        classpath "com.google.gms:google-services:4.3.10"
         classpath files('libs/gradle-witness.jar')
     }
 }