[Android] Propagate exit code up through generated test runner wrappers.
[Android] Propagate exit code up through generated test runner wrappers.

BUG=

Review URL: https://codereview.chromium.org/1336413005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#348888}

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