Clear cached on TRIM_MEMORY_BACKGROUND

TRIM_MEMORY_MODERATE is not sent since UDC.

Bug: 329427668
Change-Id: I468384b30583eb6f08f3bab3657215f42050b042
diff --git a/java/com/android/dialer/contactphoto/ContactPhotoManagerImpl.java b/java/com/android/dialer/contactphoto/ContactPhotoManagerImpl.java
index f7f79e1..e0a04aa 100644
--- a/java/com/android/dialer/contactphoto/ContactPhotoManagerImpl.java
+++ b/java/com/android/dialer/contactphoto/ContactPhotoManagerImpl.java
@@ -369,7 +369,7 @@
     if (DEBUG) {
       LogUtil.d("ContactPhotoManagerImpl.onTrimMemory", "onTrimMemory: " + level);
     }
-    if (level >= ComponentCallbacks2.TRIM_MEMORY_MODERATE) {
+    if (level >= ComponentCallbacks2.TRIM_MEMORY_BACKGROUND) {
       // Clear the caches.  Note all pending requests will be removed too.
       clear();
     }