Make ViewPager aware of EdgeEffect on ICS devices.

Add EdgeEffectCompat for apps that also want to selectively show the
ICS-style edge effect.

Add ViewCompat methods for checking/changing over scroll modes on GB+

Change-Id: If0de62c389c9eaef4593f2321ee99787b13b2418
diff --git a/v4/Android.mk b/v4/Android.mk
index e35e207..7f7c74a 100644
--- a/v4/Android.mk
+++ b/v4/Android.mk
@@ -35,6 +35,15 @@
 
 # -----------------------------------------------------------------------
 
+# A helper sub-library that makes direct use of Gingerbread APIs.
+include $(CLEAR_VARS)
+LOCAL_MODULE := android-support-v4-gingerbread
+LOCAL_SDK_VERSION := 9
+LOCAL_SRC_FILES := $(call all-java-files-under, gingerbread)
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+# -----------------------------------------------------------------------
+
 # A helper sub-library that makes direct use of Honeycomb APIs.
 include $(CLEAR_VARS)
 LOCAL_MODULE := android-support-v4-honeycomb
@@ -70,6 +79,7 @@
 LOCAL_STATIC_JAVA_LIBRARIES += \
         android-support-v4-eclair \
         android-support-v4-froyo \
+        android-support-v4-gingerbread \
         android-support-v4-honeycomb \
         android-support-v4-honeycomb-mr2 \
         android-support-v4-ics