Fix issue #2448075: aapt doesn't fix up activity-alias android:targetActivity links

And related:

- The aapt tool now sets a resource configurations sdk level to match any configs
  that have been set (for example if you specify density your sdk level will be
  at least 4).
- New option to modify the targetPackage attribute of instrumentation.
- Clean up of aapt options help.
- Fix of UI type values to leave 0 for "unspecified".
- Make the UI mode config APIs public.
diff --git a/tools/aapt/AaptAssets.h b/tools/aapt/AaptAssets.h
index 9a848e4..eeb00c0 100644
--- a/tools/aapt/AaptAssets.h
+++ b/tools/aapt/AaptAssets.h
@@ -45,6 +45,15 @@
     AXIS_VERSION
 };
 
+enum {
+    SDK_CUPCAKE = 3,
+    SDK_DONUT = 4,
+    SDK_ECLAIR = 5,
+    SDK_ECLAIR_0_1 = 6,
+    SDK_MR1 = 7,
+    SDK_FROYO = 8,
+};
+
 /**
  * This structure contains a specific variation of a single file out
  * of all the variations it can have that we can have.