Add Swarming task for downloading Android SDK on Skia bots

scripts/slave/recipes/skia/swarm_trigger.expected/Build-Mac-Clang-x86_64-Release.json

 [
   {
     "cmd": [
       "git",
       "remote",
       "set-url",
       "origin",
       "https://skia.googlesource.com/skia.git"
     ],
     "cwd": "[SLAVE_BUILD]/skia",
@@ skipping 404 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@    sys.exit(1)@@@",
       "@@@STEP_LOG_LINE@python.inline@  os.makedirs(path, mode)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[BUILD]/scripts/slave/recipes/skia/gsutil.isolate\", \n        \"--isolated\", \n        \"[SLAVE_BUILD]/swarming_temp_dir/skia-task-isolate_gsutil.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\"\n    ], \n    \"dir\": \"[BUILD]/scripts/slave/recipes/skia\", \n    \"version\": 1\n}",
+      "[SLAVE_BUILD]/swarming_temp_dir/isolate_gsutil.isolated.gen.json"
+    ],
+    "name": "Write isolate_gsutil.isolated.gen.json"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_MODULE[build::isolate]/resources/isolate.py",
+      "[SLAVE_BUILD]/swarming.client",
+      "batcharchive",
+      "--dump-json",
+      "/path/to/tmp/json",
+      "--isolate-server",
+      "https://isolateserver.appspot.com",
+      "--verbose",
+      "[SLAVE_BUILD]/swarming_temp_dir/isolate_gsutil.isolated.gen.json"
+    ],
+    "name": "isolate tests (2)",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"isolate_gsutil\": \"[dummy hash for isolate_gsutil]\"@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@SET_BUILD_PROPERTY@swarm_hashes@{\"isolate_gsutil\": \"[dummy hash for isolate_gsutil]\"}@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
+      "[SLAVE_BUILD]/swarming_temp_dir",
+      "511"
+    ],
+    "name": "makedirs swarming tmp dir (3)",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import sys, os@@@",
+      "@@@STEP_LOG_LINE@python.inline@path = sys.argv[1]@@@",
+      "@@@STEP_LOG_LINE@python.inline@mode = int(sys.argv[2])@@@",
+      "@@@STEP_LOG_LINE@python.inline@if not os.path.isdir(path):@@@",
+      "@@@STEP_LOG_LINE@python.inline@  if os.path.exists(path):@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print \"%s exists but is not a dir\" % path@@@",
+      "@@@STEP_LOG_LINE@python.inline@    sys.exit(1)@@@",
+      "@@@STEP_LOG_LINE@python.inline@  os.makedirs(path, mode)@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "{\n    \"args\": [\n        \"--isolate\", \n        \"[SLAVE_BUILD]/skia/infra/bots/compile_skia.isolate\", \n        \"--isolated\", \n        \"[SLAVE_BUILD]/swarming_temp_dir/skia-task-compile_skia.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"Mac\", \n        \"--blacklist\", \n        \".git\", \n        \"--blacklist\", \n        \"out\", \n        \"--blacklist\", \n        \"*.pyc\", \n        \"--extra-variable\", \n        \"WORKDIR\", \n        \"[SLAVE_BUILD]\", \n        \"--extra-variable\", \n        \"BUILD\", \n        \"[BUILD]\"\n    ], \n    \"dir\": \"[SLAVE_BUILD]\", \n    \"version\": 1\n}",
       "[SLAVE_BUILD]/swarming_temp_dir/compile_skia.isolated.gen.json"
     ],
     "name": "Write compile_skia.isolated.gen.json"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::isolate]/resources/isolate.py",
       "[SLAVE_BUILD]/swarming.client",
       "batcharchive",
       "--dump-json",
       "/path/to/tmp/json",
       "--isolate-server",
       "https://isolateserver.appspot.com",
       "--verbose",
       "[SLAVE_BUILD]/swarming_temp_dir/compile_skia.isolated.gen.json"
     ],
-    "name": "isolate tests (2)",
+    "name": "isolate tests (3)",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"compile_skia\": \"[dummy hash for compile_skia]\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@",
       "@@@SET_BUILD_PROPERTY@swarm_hashes@{\"compile_skia\": \"[dummy hash for compile_skia]\"}@@@"
     ]
   },
   {
     "cmd": [
@@ skipping 170 matching lines @@
       "@@@STEP_LOG_END@json.output@@@",
       "@@@STEP_LINK@shard #0 isolated out@blah@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]