Add support for vsync on android viewer.

Bug: skia:
Change-Id: Idcb3e3b0a67c2da65c99c597686cb55961142a38
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/204263
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/tools/viewer/Viewer.cpp b/tools/viewer/Viewer.cpp
index c847893..3350cd4 100644
--- a/tools/viewer/Viewer.cpp
+++ b/tools/viewer/Viewer.cpp
@@ -318,6 +318,13 @@
         this->fZoomWindowFixed = !this->fZoomWindowFixed;
         fWindow->inval();
     });
+    fCommands.addCommand('v', "VSync", "Toggle vsync on/off", [this]() {
+        DisplayParams params = fWindow->getRequestedDisplayParams();
+        params.fDisableVsync = !params.fDisableVsync;
+        fWindow->setRequestedDisplayParams(params);
+        this->updateTitle();
+        fWindow->inval();
+    });
     fCommands.addCommand('s', "Overlays", "Toggle stats display", [this]() {
         fStatsLayer.setActive(!fStatsLayer.getActive());
         fWindow->inval();
@@ -406,13 +413,6 @@
         this->updateTitle();
         fWindow->inval();
     });
-    fCommands.addCommand('v', "VSync", "Toggle vsync on/off", [this]() {
-        DisplayParams params = fWindow->getRequestedDisplayParams();
-        params.fDisableVsync = !params.fDisableVsync;
-        fWindow->setRequestedDisplayParams(params);
-        this->updateTitle();
-        fWindow->inval();
-    });
     fCommands.addCommand('H', "Font", "Hinting mode", [this]() {
         if (!fFontOverrides.fHinting) {
             fFontOverrides.fHinting = true;