Merge changes I2c15353c,If90e1b8d,Ibaa25dbc,Iabeacf46,Iaa5f1e11, ...
* changes:
Mark stable and document libcore.util.XmlObjectFactory
Mark stable and document libcore.util.SneakyThrow
Mark stable and document libcore.util.NativeAllocationRegistry
Mark stable and document libcore.io.Streams
Mark stable and document libcore.io.Memory
Mark stable and document libcore.io.IoUtils
Mark stable and document libcore.io.{Os,ForwardingOs}
Mark stable and document javax.net.ssl.HttpsURLConnection
Mark stable and document java.util.LinkedHashMap
Mark stable and document java.text.DateFormat
Mark stable java.security.Provider and java.security.Signature
Mark stable java.nio.ByteBuffer#setAccessible
Mark stable java.net.InetAddress
Mark stable and document java.lang.Thread
Mark stable FileInputStream constructor
Mark stable getter and setter exposing FileDescriptor
Mark stable and document dalvik.system.RuntimeHooks
Mark stable and document dalvik.system.PathClassLoader
Mark stable and document dalvik.system.DexFile