Add Capabilities::relaxedFloat32toFloat16Performance for 1.1.

Test: VtsHalNeuralnetworksV1_0TargetTest --hal_service_instance=android.hardware.neuralnetworks@1.0::IDevice/sample-all
Test: VtsHalNeuralnetworksV1_0TargetTest --hal_service_instance=android.hardware.neuralnetworks@1.0::IDevice/hvx
Test: VtsHalNeuralnetworksV1_1TargetTest --hal_service_instance=android.hardware.neuralnetworks@1.1::IDevice/sample-all
Test: NeuralNetworksTest_static

Bug: 63911257

Merged-In: I040b68d84504180ba3039e4690d0cd43c2c2649f
Change-Id: I040b68d84504180ba3039e4690d0cd43c2c2649f
(cherry picked from commit 4b458caa)