Remove some unnecessary call tab requeries.

app/src/main/java/org/thoughtcrime/securesms/calls/log/CallLogViewModel.kt

@@ -82,6 +82,7 @@ class CallLogViewModel(
     disposables += AppDependencies
       .signalCallManager
       .peekInfoCache
+      .skipWhile { cache -> cache.isEmpty() || cache.values.all { it.isCompletelyInactive } }
       .observeOn(Schedulers.computation())
       .distinctUntilChanged()
       .subscribe {

app/src/main/java/org/thoughtcrime/securesms/service/webrtc/CallLinkPeekInfo.kt

@@ -17,6 +17,10 @@ data class CallLinkPeekInfo(
   val isActive: Boolean,
   val isJoined: Boolean
 ) {
+
+  val isCompletelyInactive
+    get() = callId == null && !isActive && !isJoined
+
   companion object {
     @JvmStatic
     fun fromPeekInfo(peekInfo: PeekInfo): CallLinkPeekInfo {

core-util/src/main/java/org/signal/core/util/concurrent/RxExtensions.kt

@@ -73,3 +73,20 @@ fun <S : Subject<T>, T : Any> Single<T>.subscribeWithSubject(
 
   return subject
 }
+
+/**
+ * Skips the first item emitted from the flowable, but only if it matches the provided [predicate].
+ */
+fun <T : Any> Flowable<T>.skipFirstIf(predicate: (T) -> Boolean): Flowable<T> {
+  return this
+    .scan(Pair<Boolean, T?>(false, null)) { acc, item ->
+      val firstItemInList = !acc.first
+      if (firstItemInList && predicate(item)) {
+        true to null
+      } else {
+        true to item
+      }
+    }
+    .filter { it.second != null }
+    .map { it.second!! }
+}