Update Dialog Messages during Companion Update

Change-Id: Ida8c09dfe0c5006516ea07d5104f85ff937b004a
Don’t Check for a WiFi Connection when running in the Emulator

Don’t Check for a WiFi Connection when running in the Emulator, even
when started manually from the launcher in the emulator. This avoids
confusion when people are updating the Companion within the emulator.

Change-Id: I424a8caeec9741892fe340740781c71564725c89