FR: Allow creating conditions for cross-platform apps with same Bundle ID

[marcoreni]

Feature proposal

• Firebase Component: Remote Config

NOTE: this is related to #8355
NOTE: This is not strictly SDK-related

Apple suggests to use the same Bundle Identifier for apps for multiple systems. However, the only Platforms allowed inside Remote Config Conditions are "iOS", "Android" and "Web", therefore it's not possible to create a segment for tvOS (or macOS, ...).

It should be possible to create conditions for specific platforms so that it's possible to customize configurations for specific device types.