Set sdk_version 28 in aidl_interface

default value of sdk_version in aidl_interface is changed.("28" -> "system_current")
so sdk_version of this module have to be "28" because it is included in framework.jar.

Test: m -j
Bug: 126469673
Change-Id: Ic1c7914aaf28ed9b86d6d4a5924c6c10f58f1f3c
1 file changed
tree: c0c3d4e71de768d7b585c2a48b936904e9b0df32
  1. apexd/
  2. apexer/
  3. proto/
  4. tests/
  5. OWNERS
  6. PREUPLOAD.cfg