Whoops, wait around for pm result.

poll() returns immediately; we want to take() to wait for the result
to actually arrive.

Bug: 17510699
Change-Id: I87669e79e9941480fed33e4cc8a38de793d59e90

cmds/pm/src/com/android/commands/pm/Pm.java

@@ -1702,7 +1702,11 @@ public final class Pm {
         }
 
         public Intent getResult() {
-            return mResult.poll();
+            try {
+                return mResult.take();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
         }
     }