Fix loading screen not appearing when changing query in browser screen

Fixes #1438
Closes #1441

(cherry picked from commit 9aef08c333397caa4b897514cf76966592d3849c)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/search/SourceSearchScreen.kt
#	app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/browse/BrowseSourceScreenModel.kt

presentation-core/build.gradle.kts

@@ -45,5 +45,7 @@ dependencies {
     implementation(compose.ui.tooling.preview)
     implementation(compose.ui.util)
 
+    implementation(androidx.paging.runtime)
+    implementation(androidx.paging.compose)
     implementation(kotlinx.immutables)
 }

presentation-core/src/main/java/mihon/presentation/core/util/PagingDataUtil.kt

@@ -0,0 +1,16 @@
+package mihon.presentation.core.util
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.paging.PagingData
+import androidx.paging.compose.LazyPagingItems
+import androidx.paging.compose.collectAsLazyPagingItems
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.StateFlow
+
+@Composable
+fun <T: Any> StateFlow<Flow<PagingData<T>>>.collectAsLazyPagingItems(): LazyPagingItems<T> {
+    val flow by collectAsState()
+    return flow.collectAsLazyPagingItems()
+}