Add support for muting conversations (#1732)

* Add support for muting conversations
Implements #1731

* Fix CI

* Apply code review feedback

app/src/test/java/com/keylesspalace/tusky/BottomSheetActivityTest.kt

@@ -88,6 +88,7 @@ class BottomSheetActivityTest {
             arrayOf(),
             null,
             pinned = false,
+            muted = false,
             poll = null,
             card = null
     )

app/src/test/java/com/keylesspalace/tusky/FilterTest.kt

@@ -214,6 +214,7 @@ class FilterTest {
                 mentions = emptyArray(),
                 application = null,
                 pinned = false,
+                muted = false,
                 poll = if (pollOptions != null) {
                     Poll(
                             id = "1234",

app/src/test/java/com/keylesspalace/tusky/fragment/TimelineRepositoryTest.kt

@@ -314,6 +314,7 @@ class TimelineRepositoryTest {
                 inReplyToAccountId = null,
                 inReplyToId = null,
                 pinned = false,
+                muted = false,
                 reblog = null,
                 url = "http://example.com/statuses/$id",
                 poll = null,