Suppress Pixel_PrecisionRoundedCorner on Nexus 5/6/6P

The test has been failing since it was introduced.

TBR=ynovikov@chromium.org
BUG=chromium:1029329

Change-Id: Ifa053cbee22dee75700cbde0895659fe41e65f1c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1942432Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720000}

content/test/gpu/gpu_tests/test_expectations/pixel_expectations.txt

@@ -135,6 +135,9 @@ crbug.com/948141 Pixel_CanvasDisplaySRGBAccelerated2D [ Skip ]
 crbug.com/883500 [ android no-skia-renderer qualcomm-adreno-(tm)-330 ] Pixel_BackgroundImage [ Skip ]
 crbug.com/883500 [ android no-use-gl no-use-vulkan qualcomm-adreno-(tm)-420 ] Pixel_BackgroundImage [ Skip ]
 crbug.com/883500 [ android no-use-gl no-use-vulkan qualcomm-adreno-(tm)-430 ] Pixel_BackgroundImage [ Skip ]
+crbug.com/1029329 [ android qualcomm-adreno-(tm)-330 ] Pixel_PrecisionRoundedCorner [ Failure ]
+crbug.com/1029329 [ android qualcomm-adreno-(tm)-420 ] Pixel_PrecisionRoundedCorner [ Failure ]
+crbug.com/1029329 [ android qualcomm-adreno-(tm)-430 ] Pixel_PrecisionRoundedCorner [ Failure ]
 
 # Flakes on Nexus 5X.
 crbug.com/883500 [ android-chromium no-use-gl no-use-vulkan qualcomm-adreno-(tm)-418 ] Pixel_BackgroundImage [ RetryOnFailure ]