detach -> release

The C++ standard library uses the name "release" for the operation we call "detach".

Rewriting each "detach(" to "release(" brings us a step closer to using standard library types directly (e.g. std::unique_ptr instead of SkAutoTDelete).

This was a fairly blind transformation.  There may have been unintentional conversions in here, but it's probably for the best to have everything uniformly say "release".

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1809733002

Review URL: https://codereview.chromium.org/1809733002
diff --git a/tests/GifTest.cpp b/tests/GifTest.cpp
index caa0f6f..7f02cc1 100644
--- a/tests/GifTest.cpp
+++ b/tests/GifTest.cpp
@@ -198,7 +198,7 @@
         return;
     }
 
-    SkAutoTDelete<SkAndroidCodec> codec(SkAndroidCodec::NewFromStream(stream.detach()));
+    SkAutoTDelete<SkAndroidCodec> codec(SkAndroidCodec::NewFromStream(stream.release()));
     REPORTER_ASSERT(r, codec);
     if (!codec) {
         return;