cleanup: do not use malloc for device node string

No functional changes, just for cleanups.

Bug: 307201532
Test: check logcat in opening device node
Change-Id: Ia28b13e42f33bc3421b149ba87a885af6d537478
3 files changed
tree: 9bc5623b75f46c3c7b0dffa1dc6bab4762b2b3f0
  1. aidl/
  2. extns/
  3. halimpl/
  4. Android.bp