chore: skip grpc-android during bom validation

[mpeddada1]

Bom.readBom(bomPath); is called in CreateBomCanaryProject which creates a canary project (a sample directory with a pom) for BOM validation.

The validation of grpc-android first failed in googleapis/sdk-platform-java#1989 with the following error message even though grpc-android is available at https://repo1.maven.org/maven2/io/grpc/grpc-android/1.58.0/grpc-android-1.58.0.aar :

Error:  Failed to execute goal on project bom-validation-canary-project: Could not resolve dependencies for project com.google.cloud:bom-validation-canary-project:jar:0.0.1-SNAPSHOT: The following artifacts could not be resolved: io.grpc:grpc-android:jar:1.58.0, io.grpc:grpc-binder:jar:1.58.0, androidx.annotation:annotation:jar:1.6.0, androidx.core:core:jar:1.10.1, androidx.lifecycle:lifecycle-common:jar:2.6.1, io.grpc:grpc-cronet:jar:1.58.0, org.chromium.net:cronet-api:jar:108.5359.79: Could not find artifact io.grpc:grpc-android:jar:1.58.0 in central (https://repo.maven.apache.org/maven2) -> [Help 1]

Since grpc-android is not used in the java client libraries, it's existence doesn't have to be verified.

[sonarqubecloud]

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[suztomo]

Would you fix https://github.com/googleapis/java-cloud-bom/blob/721ee5581994fb05f5b4a29652bfde9b58d29164/tests/validate-bom/src/main/java/com/google/cloud/CreateBomCanaryProject.java#L49?

[mpeddada1]

Closing this PR in favor of googleapis/java-cloud-bom#6189