Fixed crash_keys crash on Android TV.
Fixed crash_keys crash on Android TV.

BUG=internal b/28148017
TEST=Built and ran cast_shell_internal_apk

Review URL: https://codereview.chromium.org/1887723002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#387144}

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