Roll external/skia 507b8984ffd0..9d91492203f0 (28 commits)

https://skia.googlesource.com/skia.git/+log/507b8984ffd0..9d91492203f0

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Test: Presubmit checks will test this change.
Change-Id: Ia7cd8f63dab03b4f9b7bcf5a86e13100437b9836
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diff --git a/Android.bp b/Android.bp
index 293514e..63eceba 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1174,6 +1174,7 @@
         "gm/complexclip_blur_tiled.cpp",
         "gm/composeshader.cpp",
         "gm/compositor_quads.cpp",
+        "gm/compressed_textures.cpp",
         "gm/concavepaths.cpp",
         "gm/conicpaths.cpp",
         "gm/constcolorprocessor.cpp",
@@ -1232,7 +1233,6 @@
         "gm/encode_alpha_jpeg.cpp",
         "gm/encode_platform.cpp",
         "gm/encode_srgb.cpp",
-        "gm/etc1.cpp",
         "gm/extractbitmap.cpp",
         "gm/fadefilter.cpp",
         "gm/fatpathfill.cpp",
@@ -2129,6 +2129,7 @@
         "gm/complexclip_blur_tiled.cpp",
         "gm/composeshader.cpp",
         "gm/compositor_quads.cpp",
+        "gm/compressed_textures.cpp",
         "gm/concavepaths.cpp",
         "gm/conicpaths.cpp",
         "gm/constcolorprocessor.cpp",
@@ -2187,7 +2188,6 @@
         "gm/encode_alpha_jpeg.cpp",
         "gm/encode_platform.cpp",
         "gm/encode_srgb.cpp",
-        "gm/etc1.cpp",
         "gm/extractbitmap.cpp",
         "gm/fadefilter.cpp",
         "gm/fatpathfill.cpp",