Improve clipboard API.

- Rename ClippedData to ClipData.
- Introudce ClipDescription subclass.
- Add convenience APIs for creating a ClipData.
- Add ClipboardManager API to get just the ClipDescription.
- Define MIME types associated with a clip.

Change-Id: If97ef91aa99a4dd0ec74ccaea504345c9ef12b5c
diff --git a/CleanSpec.mk b/CleanSpec.mk
index a9f4d19..e961a5a 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -77,6 +77,7 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/symbols/system/lib/libhwui.so)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib/libhwui.so)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/os/storage/*)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/content/IClipboard.P)
 
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST