Return empty ATR vector in getATR API

The ATR is not supported by SPI in the secure element. The HAL should
return empty vector instead of returning the ATP.

Bug: 131298247
Test: AccessRule loaded successfully
      atest VtsHalSecureElementV1_0TargetTest

Merged-In: Id7cb9c1aa0b3a4fed96d7ecaa8933b464942137d
Change-Id: Id7cb9c1aa0b3a4fed96d7ecaa8933b464942137d
4 files changed