Setup VR builder and tester

tools/mb/mb_config.pyl

Index: tools/mb/mb_config.pyl
diff --git a/tools/mb/mb_config.pyl b/tools/mb/mb_config.pyl
index 0915f917256f3721bf7284762ea88f46144e8966..84b3d182c045c503ff5e84c51b306ea143feb803 100644
--- a/tools/mb/mb_config.pyl
+++ b/tools/mb/mb_config.pyl
@@ -110,7 +110,8 @@
       'Android Remoting Tests': 'none',
       'Android Tests (trial)(dbg)': 'none',
       'Android Tests (x86 emulator)': 'android_gn_debug_static_bot_x86',
-      'Android Builder (dbg)': 'android_gn_debug_static_bot',
+      'Android VR Tests': 'none',
+      'Android Builder (dbg)': 'android_gn_debug_static_bot_vr_shell',
       'Android deterministic':
         'android_without_codecs_gn_release_bot_minimal_symbols',
       'Browser Side Navigation Linux': 'gn_release_bot',
@@ -1109,6 +1110,10 @@
       'android', 'gn', 'debug_static_bot', 'x86',
     ],
 
+    'android_gn_debug_static_bot_vr_shell': [
+      'android', 'gn', 'debug_static_bot', 'vr_shell',
+    ],
+
     'android_gn_debug_static_minimal_symbols_mipsel': [
       'android', 'gn', 'debug', 'static', 'minimal_symbols', 'mipsel',
     ],
@@ -2441,6 +2446,10 @@
       'gyp_defines': 'v8_enable_verify_heap=1',
     },
 
+    'vr_shell': {
+      'gn_args': 'enable_vr_shell=true',
+    },
+
     'win_analyze': {
       'gn_args': 'use_vs_code_analysis=true',
       'gyp_defines': 'win_analyze=1',