Bug 1201540 - Producing FOTA packages for foxfood. r=wcosta

Foxfood devices are Sony Xperia Z3c devices. We need to be able to push
updates of the Gonk layer to fix some bugs. Those requires changes to
the kernel, to boot partition and to some other assets. Hence we add
support for producing all kind of updates packages we might need on that
device:
 - ota, to update just Gecko/Gaia
 - fota, to update Gecko/Gaia in recovery mode
 - fota:fullimg, to be able to update gonk also

b2g/config/aries/config.json

@@ -11,13 +11,15 @@
     "upload_files": [
         "{objdir}/dist/b2g-*.crashreporter-symbols.zip",
         "{objdir}/dist/b2g-*.tar.gz",
-        "{workdir}/sources.xml"
+        "{workdir}/sources.xml",
+        "{workdir}/out/target/product/aries/fota-*-update-*.mar"
     ],
     "public_upload_files": [
         "{objdir}/dist/b2g-*.crashreporter-symbols.zip",
         "{objdir}/dist/b2g-*.tar.gz",
         "{workdir}/sources.xml",
-        "{objdir}/dist/b2g-update/*.mar"
+        "{objdir}/dist/b2g-update/*.mar",
+        "{workdir}/out/target/product/aries/fota-*-update.mar"
     ],
     "zip_files": [
         ["{workdir}/out/target/product/aries/*.img", "out/target/product/aries/"],

testing/mozharness/configs/b2g/taskcluster-spark-dogfood.py

@@ -7,10 +7,8 @@ config = {
         'build',
         'build-symbols',
         'make-updates',
-        'prep-upload',
-        'submit-to-balrog'
+        'prep-upload'
     ],
-    "balrog_credentials_file": "balrog_credentials",
     "nightly_build": True,
     "env": {
         "GAIA_OPTIMIZE": "1",
@@ -21,8 +19,10 @@ config = {
         "BOWER_FLAGS": "--allow-root",
         "B2G_PATH": "%(work_dir)s",
         "GAIA_DISTRIBUTION_DIR": "%(work_dir)s/gaia/distros/spark",
-        "WGET_OPTS": "-c -q"
+        "WGET_OPTS": "-c -q",
+        "B2G_FOTA_FULLIMG_PARTS": "/boot:boot.img /system:system.img /recovery:recovery.img"
     },
+    "update_types": [ "ota", "fota", "fota:fullimg" ],
     "is_automation": True,
     "repo_remote_mappings": {
         'https://android.googlesource.com/': 'https://git.mozilla.org/external/aosp',

testing/taskcluster/tasks/builds/b2g_aries_spark_dogfood.yml

@@ -16,7 +16,6 @@ task:
     env:
       VARIANT: userdebug
       DOGFOOD: 1
-      HARDWARE_COMPOSER: 0
       MOZHARNESS_CONFIG: b2g/taskcluster-spark-dogfood.py
   extra:
     treeherderEnv: