Make it as singleton and create setScope and start function.

Change-Id: I842554dfa2884942a0c74a2ecd0645020238f237

app/src/main/kotlin/com/google/samples/apps/nowinandroid/util/ProfileVerifierLogger.kt

@@ -46,14 +46,15 @@ import kotlinx.coroutines.launch
  *
  * @see androidx.profileinstaller.ProfileVerifier.CompilationStatus.ResultCode
  */
-class ProfileVerifierLogger (
+object ProfileVerifierLogger {
-    private val scope: CoroutineScope,
+    private const val TAG = "ProfileInstaller"
-) {
+    private var scope: CoroutineScope? = null
-    companion object {
+
-        private const val TAG = "ProfileInstaller"
+    fun setScope(scope: CoroutineScope) {
+        this.scope = scope
     }
 
-    operator fun invoke() = scope.launch {
+    fun start() = scope?.launch {
         val status = ProfileVerifier.getCompilationStatusAsync().await()
         Log.d(TAG, "Status code: ${status.profileInstallResultCode}")
         Log.d(