eglSurfaceAttrib EGL_TIMESTAMPS_ANDROID non-window surface fix.

The spec says:
"If attribute is EGL_TIMESTAMPS_ANDROID, then values specifies whether
to enable/disable timestamp collection for this surface. A value of
EGL_TRUE enables timestamp collection, while a value of EGL_FALSE
disables it. The initial value is false. If surface is not a window
surface this has no effect."

Setting an error is considered a side effect, so return
EGL_TRUE for EGL_TIMESTAMPS_ANDROID attribute.

BUG: 174481138
Test: APK b/174481138#comment1, `adb logcat *:E -e egl` no error
Change-Id: Ia6f04126bd3dead47648a1c71f7100224f28553d
diff --git a/opengl/libs/EGL/egl_platform_entries.cpp b/opengl/libs/EGL/egl_platform_entries.cpp
index f576660..de36a7a 100644
--- a/opengl/libs/EGL/egl_platform_entries.cpp
+++ b/opengl/libs/EGL/egl_platform_entries.cpp
@@ -1453,7 +1453,9 @@
 
     if (attribute == EGL_TIMESTAMPS_ANDROID) {
         if (!s->getNativeWindow()) {
-            return setError(EGL_BAD_SURFACE, (EGLBoolean)EGL_FALSE);
+            // According to the spec, "if surface is not a window surface this has no
+            // effect."
+            return EGL_TRUE;
         }
         int err = native_window_enable_frame_timestamps(s->getNativeWindow(), value != 0);
         return (err == 0) ? EGL_TRUE : setError(EGL_BAD_SURFACE, (EGLBoolean)EGL_FALSE);