[Mono] Fail the runtime tests, when mobile apps failed to install

[fanyang-mono]

Based on the conversation happened at dotnet/xharness#672, need to fail the runtime tests, when mobile apps failed to install.

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Issue Details

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Based on the conversation happened at dotnet/xharness#672, need to fail the runtime tests, when mobile apps failed to install.

Author:	fanyang-mono
Assignees:	fanyang-mono
Labels:	area-Infrastructure
Milestone:	6.0.0