RFR: 8328005: Convert java/awt/im/JTextFieldTest.java applet test to main

[Damon Nguyen]

Convert java/awt/im/JTextFieldTest.java applet test to main using PassFailJFrame.

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Commit messages:
 - Initial test changes

Changes: https://git.openjdk.org/jdk/pull/18247/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18247&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328005
  Stats: 72 lines in 2 files changed: 15 ins; 31 del; 26 mod
  Patch: https://git.openjdk.org/jdk/pull/18247.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18247/head:pull/18247

PR: https://git.openjdk.org/jdk/pull/18247