[LUCI] Add android builders "Android x* Builder (dbg)" to luci-scheduler

Bug: 790536, 790521
Change-Id: I0479b74551bbd38841721ea549b198c6dfc2cdac
Reviewed-on: https://chromium-review.googlesource.com/956551Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Shenghua Zhang <shenghuazhang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541969}

infra/config/global/luci-scheduler.cfg

@@ -53,6 +53,8 @@ trigger {
 
   # Android. Sorted alphabetically.
   triggers: "Android arm64 Builder (dbg)"
+  triggers: "Android x64 Builder (dbg)"
+  triggers: "Android x86 Builder (dbg)"
 
   # Linux. Sorted alphabetically.
   triggers: "Cast Linux"
@@ -116,6 +118,26 @@ job {
   # }
 }
 
+job {
+  id: "Android x64 Builder (dbg)"
+  acl_sets: "default"
+  buildbucket: {
+    server: "cr-buildbucket.appspot.com"
+    bucket: "luci.chromium.ci"
+    builder: "Android x64 Builder (dbg)"
+  }
+}
+
+job {
+  id: "Android x86 Builder (dbg)"
+  acl_sets: "default"
+  buildbucket: {
+    server: "cr-buildbucket.appspot.com"
+    bucket: "luci.chromium.ci"
+    builder: "Android x86 Builder (dbg)"
+  }
+}
+
 job {
   id: "Marshmallow 64 bit Tester"
   # triggered by "Android arm64 Builder (dbg)"