Add HAL changes for SEAT_HEADREST_HEIGHT_POS_V2 and deprecate SEAT_HEADREST_HEIGHT_POS

This deprecation process is for the currently unusable property SEAT_HEADREST_HEIGHT_POS which targets the GLOBAL area type instead of the SEAT area type. This means that changes apply to all seats instead of individual seats. This new property addresses this issue and solves it.

Bug: 242587816
Test: atest VtsHalAutomotiveVehicle_TargetTest
      atest CtsCarTestCases:CarPropertyManagerTest
      atest CtsCarTestCases:VehiclePropertyIdsTest
Change-Id: I1102ffcac6e0c97d73dfc574a5c863a2082d8f3f
diff --git a/current.txt b/current.txt
index 0fb8b49..fbdd3fe 100644
--- a/current.txt
+++ b/current.txt
@@ -932,5 +932,6 @@
 # ABI preserving changes to HALs during Android U
 2aa559cda86c358c6429114ef6bc72c1b43281e98f9eb6b4df5e7073c8d05767 android.hardware.automotive.vehicle@2.0::types
 42abd285a4293dadb8c89bc63b90cae2872fbffe90c4517aa3ea4965e8aecff7 android.hardware.graphics.common@1.2::types
+4f1a02d21a22104c734f71cdbba19b6f7e93d4ee107ff79f0dbdd171a8430e0e android.hardware.automotive.vehicle@2.0::types
 
 # There will be no more HIDL HALs. Use AIDL instead.