Enforce product interface by default

We have both with/without product interface enforced targets.
Because of this, unbundled apps in the product partition must consider
bundled cases and has to add `jni_uses_platform_apis: true` to use jni
libraries.
As targets with PRODUCT_SHIPPING_API_LEVEL > 29 must enforce the
product interfaces, if PRODUCT_SHIPPING_API_LEVEL is not defined,
enforce the product stable interface by default.

Bug: 273386586
Test: TH
Change-Id: I5874bf0ae8477fab7b1097ad24c9cc0d95543eb1