Adding android_devices dimension to newly swarmed android perf device.

testing/buildbot/chromium.perf.fyi.json

Index: testing/buildbot/chromium.perf.fyi.json
diff --git a/testing/buildbot/chromium.perf.fyi.json b/testing/buildbot/chromium.perf.fyi.json
index 59dcac9659553b075cf3865eb0f9de5af62d5319..741637e8369639f7026d018fe031b83e9af48a0e 100644
--- a/testing/buildbot/chromium.perf.fyi.json
+++ b/testing/buildbot/chromium.perf.fyi.json
@@ -20,6 +20,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device1",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -47,6 +48,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device1",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -73,6 +75,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device2",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -100,6 +103,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device2",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -126,6 +130,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device3",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -153,6 +158,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device3",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -179,6 +185,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device4",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -206,6 +213,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device4",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -232,6 +240,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device5",
               "os": "Android",
               "pool": "Chrome-perf"
@@ -259,6 +268,7 @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
+              "android_devices": "1",
               "id": "build245-m4--device5",
               "os": "Android",
               "pool": "Chrome-perf"