Revert "Update Window Extensions library APIs"

Revert submission 20478705-functional_interface

Reason for revert: DroidMonitor-triggered revert due to breakage https://android-build.googleplex.com/builds/tests/view?testResultId=TR92628441204212347, bug b/264025195.

Reverted changes: /q/submissionid:20478705-functional_interface

Tests: https://android-build.googleplex.com/builds/abtd/run/L11300000957955121
Change-Id: I9f43d52c370d95a7a8a1e50746efc56ff3403c9c
diff --git a/libs/WindowManager/Jetpack/Android.bp b/libs/WindowManager/Jetpack/Android.bp
index a5b192c..dc4b563 100644
--- a/libs/WindowManager/Jetpack/Android.bp
+++ b/libs/WindowManager/Jetpack/Android.bp
@@ -63,12 +63,6 @@
     sdk_version: "current",
 }
 
-android_library_import {
-    name: "window-extensions-core",
-    aars: ["window-extensions-core-release.aar"],
-    sdk_version: "current",
-}
-
 java_library {
     name: "androidx.window.extensions",
     srcs: [
@@ -76,10 +70,7 @@
         "src/androidx/window/util/**/*.java",
         "src/androidx/window/common/**/*.java",
     ],
-    static_libs: [
-        "window-extensions",
-        "window-extensions-core",
-    ],
+    static_libs: ["window-extensions"],
     installable: true,
     sdk_version: "core_platform",
     system_ext_specific: true,