AAPT: Use the right enum when checking for density configurations

Bug:19116675
Change-Id: I2322d8d6bdf890005c80014273e5d07df735ed50
diff --git a/tools/aapt/AaptConfig.cpp b/tools/aapt/AaptConfig.cpp
index e88c27a..ede9e99 100644
--- a/tools/aapt/AaptConfig.cpp
+++ b/tools/aapt/AaptConfig.cpp
@@ -796,7 +796,7 @@
 }
 
 bool isDensityOnly(const ResTable_config& config) {
-    if (config.density == ResTable_config::DENSITY_NONE) {
+    if (config.density == ResTable_config::DENSITY_DEFAULT) {
         return false;
     }