RFR: JDK-8257401: Use switch expressions in jdk.internal.net.http and java.net.http [v4]

[Kartik Ohri]

> Hi!
> Kindly review this patch to replace switch statements with switch expressions (where it makes sense) in the http client modules. The rationale is to improve readability of the code.
> Regards,
> Kartik

Kartik Ohri has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  Vertically align statements in switch expressions

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1364/files
  - new: https://git.openjdk.java.net/jdk/pull/1364/files/7fa11daf..3e667427

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1364&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1364&range=02-03

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1364.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1364/head:pull/1364

PR: https://git.openjdk.java.net/jdk/pull/1364