RFR: 8242924: Selection is not correct in Paint.TextureAnim

[Ajit Ghaisas]

Corrected Source blend factors of AA rendering.

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Commit messages:
 - Fix_AA_blend_factors

Changes: https://git.openjdk.java.net/lanai/pull/114/files
 Webrev: https://webrevs.openjdk.java.net/?repo=lanai&pr=114&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8242924
  Stats: 4 lines in 2 files changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/lanai/pull/114.diff
  Fetch: git fetch https://git.openjdk.java.net/lanai pull/114/head:pull/114

PR: https://git.openjdk.java.net/lanai/pull/114