Add LeakyRelu to list of NNAPI operators (#18880)

### Description
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Add LeakyRelu to the list as support was added a while ago. 


### Motivation and Context
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- If it fixes an open issue, please link to the issue here. -->

tools/ci_build/github/android/nnapi_supported_ops.md

@@ -23,6 +23,7 @@ Keep in sync with doco generated from /docs/execution-providers/NNAPI-ExecutionP
 |ai.onnx:GlobalAveragePool|Only 2D Pool is supported.|
 |ai.onnx:GlobalMaxPool|Only 2D Pool is supported.|
 |ai.onnx:Identity||
+|ai.onnx:LeakyRelu||
 |ai.onnx:Log||
 |ai.onnx:LRN||
 |ai.onnx:MatMul||