Verify java.nio.Bits against upstream OpenJDK 8u121-b13

Quite a lot of the patched methods are actually unused in Android so
they were commented out and the patches reverted as there is no point
in maintaining patches on code that is never called.

The patches were cleaned up a little bit as follows:

* Android is always little-endian.
  - Moved the setting of the byteOrder field into the static block so
    as to remove one patch. Removed some commented out code from
    byteOrder() which does not match upstream. This patch is largely
    an optimization and simplification so we could remove it
    completely without changing behavior. However, it would make it
    a lot less obvious that we only support little endian so I think
    it is worth keeping.

* Direct memory management unused on Android.
* Bulk get/put methods are unused on Android.
  - These are unused so just reverted the patches on upstream code and
    commented them all out. They are two separate patches as they
    provide different capabilities.

* Remove support for java.lang.management.
  - Android does not support the java.lang.management package which
    provides beans to monitor the JVM runtime. Updated the marker to
    make it clear why this is removed.

Commenting out the unused native methods necessitated the cleaning up
of the native code.

Bug: 110251104
Test: make dist, flash, CtsLibcoreTestCases
Change-Id: Ia1ccf6ae3ca0f13c8bb0b5ae5a3b5a49d0d4e855

0 files changed, 0 insertions, 0 deletions