Don't suppress pulsing notifications if we are already pulsing

When we receive a new alerting notification while we are already
pulsing, we make another request to DozeTriggers.requestPulse, which
rejects it, because we are already in a pulse state. This rejection
executes a callback, which removes our 2nd pulsing notification from the
alerting entries.

This CL allows calling DozeTriggers.requestPulse multiple times for new
notifications, without executing their suppression callback.

Fixes: 335560575
Test: atest DozeTriggersTest
Test: setup AOD, receive 2 pulsing notifications, check if the 2nd one
shows up
Flag: com.android.systemui.notification_pulsing_fix

Change-Id: I5e04e9d76ddf5df54ff05512b6645af29b9f238e
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 034eba0..4311e79 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -1074,3 +1074,13 @@
     purpose: PURPOSE_BUGFIX
   }
 }
+
+flag {
+  name: "notification_pulsing_fix"
+  namespace: "systemui"
+  description: "Allow showing new pulsing notifications when the device is already pulsing."
+  bug: "335560575"
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
+}