Add tethering offload HAL call via JNI

Additionally, try to locate java Control interface.

Test: as follows
    - built
    - flashed
    - booted
    - OffloadController log messages observed, but only ever
      "not enabled" messages (needs a supporting implementation)
Bug: 29337859
Bug: 32163131
Bug: 34361337
Merged-In: I5251d05f2d2fd732a33a8955a6c346b3a2401e46
Change-Id: I5251d05f2d2fd732a33a8955a6c346b3a2401e46
(cherry picked from commit 0b08ce4abb814a61a34ec3fdc5a60162fa98f290)
1 file changed
tree: 85a0408e400449353e44df99ce31520cce6d08df
  1. core/
  2. services/
  3. tests/