Replace literal with symbolic constant.

Test: atest NearbyUnitTests
BUG: 216079944
Change-Id: I08df9f2954cce6c4f77af73e405a37e1d7a9d0c4
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java b/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java
index d6625a4..5b45bd4 100644
--- a/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java
+++ b/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java
@@ -156,7 +156,7 @@
     public void initiate() {
         mIntentFilter.addAction(Intent.ACTION_SCREEN_ON);
         mIntentFilter.addAction(Intent.ACTION_SCREEN_OFF);
-        mIntentFilter.addAction("NEARBY_START_PAIRING");
+        mIntentFilter.addAction(ACTION_START_PAIRING);
 
         mLocatorContextWrapper.getContext()
                 .registerReceiver(mScreenBroadcastReceiver, mIntentFilter);