flags and hacks to get MSAN bot going

This disables a few tests in DM:
   - one BlurLargeImage GM maybe is really broken
   - FontMgrAndroidParser uses libexpat, which I've not (yet?) built from source,
     so MSAN can't see into it.

This extends some of the MSAN stifling we added around SkImageDecoder_libjpeg to SkCodec, and skips .wbmps, .pngs, and .bmps.  We're only seeing issues in colortables for .png and .bmp.

I think I can probably back out disabling Codec and the RAW image decodes...
they should all be covered by the libjpeg stifles.

BUG=skia:4550,skia:4900
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1673663002

CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot,Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-MSAN-Trybot

TBR=msarett@google.com

Review URL: https://codereview.chromium.org/1673663002
6 files changed