Add case for density=560

Fixes bug 17658836.

Change-Id: I400901c49339a4897006672a18ea55229ecb1332
diff --git a/tests/tests/app/src/android/app/cts/ActivityManagerMemoryClassTest.java b/tests/tests/app/src/android/app/cts/ActivityManagerMemoryClassTest.java
index 408efe7..7d3fc5e 100644
--- a/tests/tests/app/src/android/app/cts/ActivityManagerMemoryClassTest.java
+++ b/tests/tests/app/src/android/app/cts/ActivityManagerMemoryClassTest.java
@@ -98,6 +98,10 @@
                 expectedMinimumMemory = isXLarge ? 256 : 128;
                 break;
 
+            case DisplayMetrics.DENSITY_560:
+                expectedMinimumMemory = isXLarge ? 512 : 256;
+                break;
+
             case DisplayMetrics.DENSITY_XXXHIGH:
                 expectedMinimumMemory = isXLarge ? 512 : 256;
                 break;