There is no necessary minimum. 15 is fine. But FYI, your application will not work on 15. The Instant Apps environment itself is incompatible. At the moment, this happens only until 23 (but we are working on it).
Source: I'm on the Instant Apps team. I checked the post verification code to make sure.
For recordings that support Instant Apps, minSdkVersion is respected. Thus, the minSdkVersion = 24 application will not be delivered to device 23.
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