<i18n dev> RFR: 8269698: Specification for methods of java.awt.im.InputContext should mention that they do nothing

[Alexander Zvegintsev]

This fix simply describes that the `java.awt.im.InputContext` is a dummy implementation, which may not conform its spec.

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Commit messages:
 - rewording
 - initial

Changes: https://git.openjdk.java.net/jdk/pull/5806/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5806&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269698
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5806.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5806/head:pull/5806

PR: https://git.openjdk.java.net/jdk/pull/5806