Make bluetooth choppy voice notification cancellable

Bug: 180480106
Test: verified by manual test
Change-Id: Ie98d94050cf814a8943c766c3a510c36c029bc92
diff --git a/src/com/android/services/telephony/CallQualityManager.java b/src/com/android/services/telephony/CallQualityManager.java
index 01b5bae..0e32ddc 100644
--- a/src/com/android/services/telephony/CallQualityManager.java
+++ b/src/com/android/services/telephony/CallQualityManager.java
@@ -99,7 +99,7 @@
                 .setContentTitle(title)
                 .setContentText(details)
                 .setStyle(new Notification.BigTextStyle().bigText(details))
-                .setOngoing(true)
+                .setAutoCancel(true)
                 .setChannelId(CALL_QUALITY_CHANNEL_ID)
                 .setOnlyAlertOnce(true)
                 .build();