Revert "cryptfs_hw:move libcryptfs_hw to system_ext"

This module was originally installed in product partition and
whitelisted in mainline_system.mk. If move to system_ext that
requires update the path in the mainline_system.mk whitelist.
This is a temp change and will be back to system_ext once
QSSI system pathing and system_ext partition changes are merged.

This reverts commit 85342b33a46a1e2d3f374f62ec27bebc5949a106.
diff --git a/Android.bp b/Android.bp
index 4c45819..1d8cb4d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -21,7 +21,7 @@
     shared_libs: commonSharedLibraries,
 
     owner: "qti",
-    system_ext_specific: true,
+    product_specific: true,
 }
 
 cc_library_headers {