RFR: 8339902: Open source couple TextField related tests [v3]

[Alexander Zuev]

> Clean up and open source five TextField related tests: 
> java/awt/TextField/CaretPositionTest;
> java/awt/TextField/SetBoundsTest;
> java/awt/TextField/SetEchoCharTest4;
> java/awt/TextField/SetPasswordTest;
> java/awt/TextField/ZeroEchoCharTest

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Some fixes based on review

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21026/files
  - new: https://git.openjdk.org/jdk/pull/21026/files/4bbc9b0a..0dce88fc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21026&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21026&range=01-02

  Stats: 6 lines in 5 files changed: 0 ins; 1 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/21026.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21026/head:pull/21026

PR: https://git.openjdk.org/jdk/pull/21026