RFR: 4860681: (bf) Add CharBuffer absolute bulk put method for CharSequence [v7]

[Brian Burkhalter]

> Add to `java.nio.CharBuffer` an absolute bulk put method which takes a `CharSequence` as its source of `char`s.

Brian Burkhalter has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:

 - 4860681: Fix java/nio/Buffer/CopyDirectMemory.java build failure
 - Merge
 - 4860681: Make test use RandomFactory
 - Merge
 - 4860681: Heap and direct buffer specializations
 - 4860681: Change some {@code ...} to <code>...</code> to prevent line breaking
 - 4860681: Modify existing test
 - Merge
 - 4860681: Add spaces to parameter lists in @see tag
 - 4860681: (bf) Add CharBuffer absolute bulk put method for CharSequence

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13744/files
  - new: https://git.openjdk.org/jdk/pull/13744/files/2ea96eed..34c828a4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13744&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13744&range=05-06

  Stats: 684320 lines in 3152 files changed: 120896 ins; 487279 del; 76145 mod
  Patch: https://git.openjdk.org/jdk/pull/13744.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13744/head:pull/13744

PR: https://git.openjdk.org/jdk/pull/13744