RFR: 8264896: Remove redundant '& 0xFF' from int-to-byte cast

[Сергей Цыпанов]

When we do
byte b1 = (byte) (value & 0xFF);
we keep from int only 1 lower byte and exactly the same can be achieved with plain cast. See the test below:
public class Main {
  public static void main(String[] args) throws Exception {
    IntStream.range(Integer.MIN_VALUE, Integer.MAX_VALUE).forEach(value -> {
      byte b1 = (byte) (value & 0xFF);
      byte b2 = (byte) value;
      if (b1 != b2) {
        throw new RuntimeException("" + value);
      }
    });
}

Also tier1 and tier2 are both OK.

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Commit messages:
 - Merge branch 'master' into bitwise
 - Remove redundant '& 0xFF' from int-to-byte cast

Changes: https://git.openjdk.java.net/jdk/pull/2826/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2826&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264896
  Stats: 50 lines in 14 files changed: 0 ins; 0 del; 50 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2826.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2826/head:pull/2826

PR: https://git.openjdk.java.net/jdk/pull/2826