Add soong namespace to sysui libs

Also, move compile-time constant to new library

Test: m checkbuild
Flag: NONE
Bug: 214238812
Change-Id: I9222a609021ba2c647a9ec59e4a62b7f30eba7b5
diff --git a/libs/WindowManager/Shell/Android.bp b/libs/WindowManager/Shell/Android.bp
index b749a06..5c978e2 100644
--- a/libs/WindowManager/Shell/Android.bp
+++ b/libs/WindowManager/Shell/Android.bp
@@ -210,7 +210,7 @@
         "androidx.recyclerview_recyclerview",
         "kotlinx-coroutines-android",
         "kotlinx-coroutines-core",
-        "iconloader_base",
+        "//frameworks/libs/systemui:iconloader_base",
         "com_android_wm_shell_flags_lib",
         "com.android.window.flags.window-aconfig-java",
         "WindowManager-Shell-proto",