Build Android with SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG.

This flag will be used on Android when built for the framework,
as well as when built for the WebView. Setting this flag for
Android means our tests can fully test CanvasStateTest.

Fix CanvasStateTest. It has bit-rotted since disabling
SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG.

Splitting off from https://codereview.chromium.org/372003002/ ,
as it seems self-contained.

BUG=b/15693384
R=djsollen@google.com, reed@google.com, mtklein@google.com

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/375943003
2 files changed