Enable WebGL 2 by default on Android

BUG=673426,295792,641635
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2717003002
Cr-Commit-Position: refs/heads/master@{#453293}

gpu/config/software_rendering_list_json.cc

@@ -18,7 +18,7 @@ const char kSoftwareRenderingListJson[] = LONG_STRING_CONST(
 {
   "name": "software rendering list",
   // Please update the version number whenever you change this file.
-  "version": "12.16",
+  "version": "12.17",
   "entries": [
     {
       "id": 1,
@@ -1375,17 +1375,6 @@ LONG_STRING_CONST(
         "webgl2"
       ]
     },
-    {
-      "id": 128,
-      "description": "WebGL 2 is not yet ready on Android",
-      "cr_bugs": [295792, 641635],
-      "os": {
-        "type": "android"
-      },
-      "features": [
-        "webgl2"
-      ]
-    },
     {
       "id":129,
       "description": "Intel drivers are buggy on Linux 2.x",