[Android] Remove all target from and add minimal_symbols to Android GN.

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 7fe295a4be698cd7168569ba4c91b77cf6f128a4..78c8cf63c6fe25aa7d9505c91d2534621430848a 100644
--- a/tools/mb/mb_config.pyl
+++ b/tools/mb/mb_config.pyl
@@ -56,7 +56,7 @@
       'Android Builder': 'swarming_android_gyp_release_bot_minimal_symbols',
       'Android Clang Builder (dbg)': 'android_clang_asan_gyp_debug_bot',
       'Android GN (dbg)': 'android_gn_debug_bot',
-      'Android GN': 'android_gn_release_bot',
+      'Android GN': 'android_gn_release_bot_minimal_symbols',
       'Android Tests (dbg)': 'swarming_android_gyp_debug_static_bot',
       'Android Tests': 'swarming_android_gyp_release_bot_minimal_symbols',
       'Cast Android (dbg)': 'android_cast_gyp_debug_static_bot',
@@ -448,6 +448,10 @@
       'android', 'gn', 'release_bot',
     ],
 
+    'android_gn_release_bot_minimal_symbols': [
+      'android', 'gn', 'release_bot_minimal_symbols',
+    ],
+
     'android_gn_release_trybot': [
       'android', 'gn', 'release_trybot',
     ],