Move hasBinders from hidden to Module API

Coverage is already added for this in BundleTests.

This API was added as hidden method in V and was only used in
system-server. This is now required to be used in
NeuralNetworks mainline module and requires to be a
non-hidden API.

Flag: android.os.enable_has_binders
Test: core/tests/coretests/src/android/os/BundleTest.java
Bug: 330345513

Change-Id: I581d25893c5f4945912f7f0c68dbed6fe867369e