Add 1.2 NN HAL interface for dynamic output shape.

Let notify_1_2() notify output shapes.

Document unspecified dimensions and rank.

Bug: 73506513
Bug: 77234888
Test: NeuralNetworksTest_static
Test: VtsHalNeuralnetworksV1_xTargetTest with 1.2 sample driver
Change-Id: I01108913212d9f4aa47daf2f293ea19259925865
diff --git a/neuralnetworks/1.2/Android.bp b/neuralnetworks/1.2/Android.bp
index 7d13104..d8762b0 100644
--- a/neuralnetworks/1.2/Android.bp
+++ b/neuralnetworks/1.2/Android.bp
@@ -27,6 +27,7 @@
         "Operation",
         "OperationType",
         "OperationTypeRange",
+        "OutputShape",
     ],
     gen_java: false,
 }