RFR: 8328631: Convert java/awt/InputMethods/InputMethodsTest/InputMethodsTest.java applet test to manual

[Alexander Zvegintsev]

Test converted to main. Tested on Linux with Japanese ibus-anthy input method.

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Commit messages:
 - initial

Changes: https://git.openjdk.org/jdk/pull/18412/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18412&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328631
  Stats: 109 lines in 2 files changed: 20 ins; 53 del; 36 mod
  Patch: https://git.openjdk.org/jdk/pull/18412.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18412/head:pull/18412

PR: https://git.openjdk.org/jdk/pull/18412