RFR: 8299425: "LCMSImageLayout.isIntPacked" flag can be deleted

[Sergey Bylokhov]

After this change we will set correct pixel formatter when we initially create it, instead of updating the pixel formatter in native based on additional "isIntPacked" flag.

FYI: The fix for https://bugs.openjdk.org/browse/JDK-7124245 added the "isIntPacked" flag to mark the non-byte pixels layouts(like TYPE_INT_RGB).
* This flag is passed around even if it is not used by the pixel layout
* It may cause unnecessary creation of new transform if one type is "rgb && isIntPacked=true" and another one is "bgr && isIntPacked=false", but the actual data is the same
see: http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/2cf07dbdee64

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Commit messages:
 - JDK-8299425: "LCMSImageLayout.isIntPacked" flag can be deleted

Changes: https://git.openjdk.org/jdk/pull/11806/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11806&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299425
  Stats: 48 lines in 4 files changed: 5 ins; 28 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/11806.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11806/head:pull/11806

PR: https://git.openjdk.org/jdk/pull/11806