Enable debugging code for non-official Android builds.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index a84b8a7081938b08050b935178cf32ae5ccadfae..bd3d7c633041f58415b4f62466bffe32e02781a1 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -943,8 +943,8 @@
         #     android_gyp
         'android_unit_test_target_type%': 'static_library',
 
-        # Choose static link by build type.
         'conditions': [
+          # Choose static link by build type.
           ['android_build_type==0', {
             'static_link_system_icu%': 1,
           }, {
@@ -1883,6 +1883,10 @@
               }],
             ],
           }],
+          # Android enables DCHECK()s on non-Official release builds.
+          ['OS=="android" and buildtype!="Official"', {
+            'defines!': ['NDEBUG'],
+          }],
         ],
       },
       #