Use a SupervisorJob in BubbleDataRepository

Using a SupervisorJob ensures that if child coroutines
fail, the scope remains active and we can launch further
coroutines in it.

Also renamed the scope field to exclude io from it. Scopes
should be tied to lifetime of objects, not to dispatchers

Bug: 281083629
Test: Verified that bubbles are still persisted after adding
      new bubbles and reordering them.
Change-Id: I38cc755d5496bfd636d8a4e26f93a26843b0508a

libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleDataRepository.kt

@@ -33,6 +33,7 @@ import com.android.wm.shell.common.ShellExecutor
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.cancelAndJoin
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.yield
@@ -45,7 +46,7 @@ internal class BubbleDataRepository(
     private val volatileRepository = BubbleVolatileRepository(launcherApps)
     private val persistentRepository = BubblePersistentRepository(context)
 
-    private val ioScope = CoroutineScope(Dispatchers.IO)
+    private val coroutineScope = CoroutineScope(Dispatchers.IO + SupervisorJob())
     private var job: Job? = null
 
     // For use in Bubble construction.
@@ -131,7 +132,7 @@ internal class BubbleDataRepository(
      */
     private fun persistToDisk() {
         val prev = job
-        job = ioScope.launch {
+        job = coroutineScope.launch {
             // if there was an ongoing disk I/O operation, they can be cancelled
             prev?.cancelAndJoin()
             // check for cancellation before disk I/O
@@ -148,7 +149,7 @@ internal class BubbleDataRepository(
      *           bubbles.
      */
     @SuppressLint("WrongConstant")
-    fun loadBubbles(userId: Int, cb: (List<Bubble>) -> Unit) = ioScope.launch {
+    fun loadBubbles(userId: Int, cb: (List<Bubble>) -> Unit) = coroutineScope.launch {
         /**
          * Load BubbleEntity from disk.
          * e.g.