Enable compilation of libbinder on Fuchsia

This ensures that getMinSchedulerPolicy and getMinSchedulerPriority are
only called on Linux as they are only defined here.

This replaces some __ANDROID__ ifdef's with BINDER_WITH_KERNEL_IPC.

Change-Id: Idec83bf1715ac3c62ac7a849aa188aa491a19fda
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 65c6553..1e83c35 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -299,8 +299,13 @@
             obj.handle = handle;
             obj.cookie = 0;
         } else {
+#if __linux__
             int policy = local->getMinSchedulerPolicy();
             int priority = local->getMinSchedulerPriority();
+#else
+            int policy = 0;
+            int priority = 0;
+#endif
 
             if (policy != 0 || priority != 0) {
                 // override value, since it is set explicitly