JDK10 RFR of JDK-JDK-8168767: java.awt.im.InputContext API doc has a reference to extensions

[Rachna Goel]

Hi,

Kindly review API Doc fix for java.awt.im.InputContext.

JBS Issue : https://bugs.openjdk.java.net/browse/JDK-8168767

Webrev: http://cr.openjdk.java.net/~rgoel/8191123/webrev/

CSR: https://bugs.openjdk.java.net/browse/JDK-8191123

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Thanks,
Rachna