Make the grey bar always available.

[huangyz0918]

Closes #2857

What has been done to verify that this works as intended?

It's safe, I only made the title bar visible.

Why is this the best possible solution? Were any other approaches considered?

N/A

How does this change affect users? Describe intentional changes to behavior and behavior that could have accidentally been affected by code changes. In other words, what are the regression risks?

N/A

Do we need any specific form for testing your changes? If so, please attach one.

No.

Does this change require updates to documentation? If so, please file an issue here and include the link below.

No.

Before submitting this PR, please make sure you have:

• run ./gradlew checkAll and confirmed all checks still pass OR confirm CircleCI build passes and run ./gradlew connectedDebugAndroidTest locally.
• verified that any code or assets from external sources are properly credited in comments and/or in the about file.
• verified that any new UI elements use theme colors. UI Components Style guidelines

[huangyz0918]

Closed since the issue is obsolete, #2857 .