Revert "Explicitly include libgui as a shared library in libgui_test."

This reverts commit 36127e6b23fd3c66d7055478b96f23ae88f7a1a1.

Reason for revert: DroidMonitor: Potential culprit for http://b/402507915 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: I12af47f3ae45e9f9f0b4891f716121b959dc6f44
diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 158c548..b5fa321 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -295,6 +295,7 @@
 cc_defaults {
     name: "libgui-defaults",
     defaults: ["libgui_bufferqueue-defaults"],
+    srcs: [":libgui-sources"],
     static_libs: [
         "libgui_aidl_static",
         "libgui_window_info_static",
@@ -318,10 +319,6 @@
         "libgui-defaults",
     ],
 
-    srcs: [
-        ":libgui-sources",
-    ],
-
     export_static_lib_headers: [
         "libgui_aidl_static",
         "libgui_window_info_static",