[build] Use same symbol level as chromium for android

This makes our configuration similar to Chromium's for
android performance testing.

This blocks deps'ing in:
https://codereview.chromium.org/2377013002

BUG=chromium:648948
NOTRY=true

Review-Url: https://codereview.chromium.org/2383743002
Cr-Commit-Position: refs/heads/master@{#39915}

infra/mb/mb_config.pyl

@@ -265,9 +265,11 @@
     'gn_release_arm': [
       'gn', 'release_bot', 'arm', 'crosscompile', 'hard_float', 'swarming'],
     'gn_release_android_arm': [
-      'gn', 'release_bot', 'arm', 'android', 'crosscompile', 'swarming'],
+      'gn', 'release_bot', 'arm', 'android', 'crosscompile',
+      'minimal_symbols', 'swarming'],
     'gn_release_android_arm64': [
-      'gn', 'release_bot', 'arm64', 'android', 'crosscompile', 'swarming'],
+      'gn', 'release_bot', 'arm64', 'android', 'crosscompile',
+      'minimal_symbols', 'swarming'],
 
     # GN release configs for x64.
     'gn_release_x64': [