Move android/soong/fs to android/soong/finder/fs

The fs package is specific to finder, move it inside finder.

Bug: 70897635
Test: m checkbuild
Change-Id: Ie705f064a832141702a8e87fd59ed75c01018504
diff --git a/finder/Android.bp b/finder/Android.bp
index b5c0e13..47b47c9 100644
--- a/finder/Android.bp
+++ b/finder/Android.bp
@@ -30,7 +30,7 @@
         "finder_test.go",
     ],
     deps: [
-      "soong-fs",
+      "soong-finder-fs",
     ],
 }