[benchmarking] disabled animometer_webgl_indexed,...

[benchmarking] disabled animometer_webgl_indexed, animometer_webgl_indexed_multi_draw_base_vertex_base_instance, animometer_webgl_indexed_multi_draw on rendering.mobile

Archives are missing for these three stories and thus all other rendering.mobile stories on the same shard stopped running since late August. Disabling them if no quick fix.

Bug: chromium:1136227
Change-Id: Iacd35a8fbda20e51341e86e7b55fd1d4d0b4e3be
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2459799Reviewed-by: John Chen <johnchen@chromium.org>
Reviewed-by: Shrek Shao <shrekshao@google.com>
Commit-Queue: Wenbin Zhang <wenbinzhang@google.com>
Cr-Commit-Position: refs/heads/master@{#815250}

tools/perf/expectations.config

@@ -255,6 +255,9 @@ crbug.com/1036357 [ android-nexus-5 ] rendering.mobile/idle_power_blank [ Skip ]
 crbug.com/1036357 [ android-nexus-5 ] rendering.mobile/balls_svg_animations [ Skip ]
 crbug.com/1116469 [ android-webview ] rendering.mobile/webgl_to_texture [ Skip ]
 crbug.com/1124237 [ android-nexus-5x android-webview ] rendering.mobile/toBlob_duration.html [ Skip ]
+crbug.com/1136227 [ android-pixel-2 android-webview ] rendering.mobile/animometer_webgl_indexed [ Skip ]
+crbug.com/1136227 [ android-pixel-2 android-webview ] rendering.mobile/animometer_webgl_indexed_multi_draw_base_vertex_base_instance [ Skip ]
+crbug.com/1136227 [ android-pixel-2 android-webview ] rendering.mobile/animometer_webgl_indexed_multi_draw [ Skip ]
 
 # Benchmark: rasterize_and_record_micro.top_25
 crbug.com/764543 rasterize_and_record_micro.top_25/file://static_top_25/wikipedia.html [ Skip ]