Add DENSITY_280

Change-Id: I10df7c2ad33e9813f1923c370f4bf91b934dea2a
diff --git a/api/22.txt b/api/22.txt
index 3e11cda..144f292 100644
--- a/api/22.txt
+++ b/api/22.txt
@@ -31435,6 +31435,7 @@
     method public boolean equals(android.util.DisplayMetrics);
     method public void setTo(android.util.DisplayMetrics);
     method public void setToDefaults();
+    field public static final int DENSITY_280 = 280; // 0x118
     field public static final int DENSITY_400 = 400; // 0x190
     field public static final int DENSITY_560 = 560; // 0x230
     field public static final int DENSITY_DEFAULT = 160; // 0xa0
diff --git a/system-api/22.txt b/system-api/22.txt
index e270926..e1a00e0 100644
--- a/system-api/22.txt
+++ b/system-api/22.txt
@@ -33660,6 +33660,7 @@
     method public boolean equals(android.util.DisplayMetrics);
     method public void setTo(android.util.DisplayMetrics);
     method public void setToDefaults();
+    field public static final int DENSITY_280 = 280; // 0x118
     field public static final int DENSITY_400 = 400; // 0x190
     field public static final int DENSITY_560 = 560; // 0x230
     field public static final int DENSITY_DEFAULT = 160; // 0xa0