gn2bp: move target.type check into _is_java_target

Cleanup -- makes the code more readable.

Test: //components/cronet/android:cronet
Change-Id: I4bb68137ac21f6204143c4fb9c74e57e9db8c5d7
diff --git a/tools/gn2bp/gn_utils.py b/tools/gn2bp/gn_utils.py
index 6fcc0f8..e90b500 100644
--- a/tools/gn2bp/gn_utils.py
+++ b/tools/gn2bp/gn_utils.py
@@ -192,7 +192,7 @@
     # Per https://chromium.googlesource.com/chromium/src/build/+/HEAD/android/docs/java_toolchain.md
     # java target names must end in "_java".
     # TODO: There are some other possible variations we might need to support.
-    return re.match('.*_java$', target.name)
+    return target.type == 'group' and re.match('.*_java$', target.name)
 
 
   def get_target(self, gn_target_name):
@@ -254,7 +254,7 @@
     elif target.type == 'copy':
       # TODO: copy rules are not currently implemented.
       self.actions[gn_target_name] = target
-    elif target.type == 'group' and self._is_java_target(target):
+    elif self._is_java_target(target):
       # java_group identifies the group target generated by the android_library
       # or java_library template. A java_group must not be added as a dependency, but sources are collected
       log.debug('Found java target %s', target.name)