Merge latest Skia into master (4 commits)

https://skia.googlesource.com/skia.git/+log/b357dea..c013892

Test: Presubmit checks will test this change.
Change-Id: Idc38bf2fd7627410f4cc8f407abe00b04d391f07
diff --git a/Android.bp b/Android.bp
index cf1e609..aeeea79 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1038,6 +1038,7 @@
         "gm/fontscaler.cpp",
         "gm/fontscalerdistortable.cpp",
         "gm/gamma.cpp",
+        "gm/gammaencodedpremul.cpp",
         "gm/gammatext.cpp",
         "gm/gamut.cpp",
         "gm/gaussianedge.cpp",
@@ -1905,6 +1906,7 @@
         "gm/fontscaler.cpp",
         "gm/fontscalerdistortable.cpp",
         "gm/gamma.cpp",
+        "gm/gammaencodedpremul.cpp",
         "gm/gammatext.cpp",
         "gm/gamut.cpp",
         "gm/gaussianedge.cpp",