refactor #853 Use LocalActivity.

Author: toastkidjp

app/src/main/java/jp/toastkid/yobidashi/main/ui/AppBar.kt

@@ -10,6 +10,7 @@ package jp.toastkid.yobidashi.main.ui
 
 import android.os.Build
 import androidx.activity.ComponentActivity
+import androidx.activity.compose.LocalActivity
 import androidx.compose.animation.AnimatedContentTransitionScope
 import androidx.compose.animation.core.spring
 import androidx.compose.foundation.ExperimentalFoundationApi
@@ -65,7 +66,7 @@ import kotlin.math.roundToInt
 @OptIn(ExperimentalFoundationApi::class)
 @Composable
 internal fun AppBar() {
-    val activity = LocalContext.current as? ComponentActivity ?: return
+    val activity = LocalActivity.current as? ComponentActivity ?: return
     val contentViewModel = viewModel(ContentViewModel::class.java, activity)
 
     val sizePx = with(LocalDensity.current) { 72.dp.toPx() }