Add docs for SDK update.
Add redirects for preview files.
Manually integrate a few doc changes from cupcake.

Change-Id:I524d7dbf929371ee501599229894640660f352ce
diff --git a/Android.mk b/Android.mk
index 1b5c70b..16d77e4 100644
--- a/Android.mk
+++ b/Android.mk
@@ -361,13 +361,13 @@
 
 ## SDK version identifiers used in the published docs
   # major[.minor] version for current SDK. (full releases only)
-framework_docs_SDK_VERSION:=1.5
+framework_docs_SDK_VERSION:=1.6
   # release version (ie "Release x")  (full releases only)
-framework_docs_SDK_REL_ID:=3
+framework_docs_SDK_REL_ID:=1
   # name of current SDK directory (full releases only)
 framework_docs_SDK_CURRENT_DIR:=$(framework_docs_SDK_VERSION)_r$(framework_docs_SDK_REL_ID)
   # flag to build offline docs for a preview release
-framework_docs_SDK_PREVIEW:=true
+framework_docs_SDK_PREVIEW:=0
 
 framework_docs_LOCAL_DROIDDOC_OPTIONS += \
 		-hdf sdk.version $(framework_docs_SDK_VERSION) \