Associate user id with unlock token handle

Note: this assumes user-0 is always unlocked otherwise one would not
be able to access shared preference for user-0 when cold booted to lock
screen.

To test this CL, turn on the following system property

android.car.systemuser.headless=true

This build flag will make Android boot into a headless user-0 model and
user-0 will always be unlocked.

Bluetooth stack gets restarted every time switching user. This CL also
ensures the BLE trust agent service is started after bluetooth finishes
rebooting.

Current limitations:
- Unlock token works only if user sets password
- Unlock token is not activated till user finishes lock-unlock once

Bug: 78602296
Bug: 77854782
Test: unlock user by trust device on Mojave
Change-Id: Ifc2bf97593adbb77d518d6b11c06ea5234a4ebbd

1 files changed, 3 insertions, 0 deletions

diff --git a/car-lib/src/android/car/trust/ICarTrustAgentBleService.aidl b/car-lib/src/android/car/trust/ICarTrustAgentBleService.aidl
index 8b50fd379a..4dec6a0a43 100644
--- a/car-lib/src/android/car/trust/ICarTrustAgentBleService.aidl
+++ b/car-lib/src/android/car/trust/ICarTrustAgentBleService.aidl
@@ -58,4 +58,7 @@ interface ICarTrustAgentBleService {
     void onEscrowTokenAdded(in byte[] token, long handle, int uid);
     void onEscrowTokenRemoved(long handle, boolean successful);
     void onEscrowTokenActiveStateChanged(long handle, boolean active);
+
+    /** Management */
+    int getUserIdByEscrowTokenHandle(long tokenHandle);
 }