Use font manager on Android.

The corresponding Blink side change is https://codereview.chromium.org/447233003/ . These two can be committed in any order.

Review URL: https://codereview.chromium.org/450733002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288168 0039d316-1c4b-4281-b951-d872f2087c98

skia/skia_common.gypi

@@ -21,11 +21,6 @@
          ['exclude', '_android\\.(cc|cpp)$'],
       ],
     }],
-    [ 'OS == "android"', {
-      'defines': [
-        'SK_FONTHOST_DOES_NOT_USE_FONTMGR',
-      ],
-    }],
     [ 'OS != "ios"', {
       'sources/': [
          ['exclude', '_ios\\.(cc|cpp|mm?)$'],