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Previously, Magisk uses persist or cache for storing modules' custom sepolicy rules. In this commit, we significantly broaden its compatibility and also prevent mounting errors. The persist partition is non-standard and also critical for Snapdragon devices, so we prefer not to use it by default. We will go through the following logic to find the best suitable non-volatile, writable location to store and load sepolicy.rule files: Unencrypted data -> FBE data unencrypted dir -> cache -> metadata -> persist This should cover almost all possible cases: very old devices have cache partitions; newer devices will use FBE; latest devices will use metadata FBE (which guarantees a metadata parition); and finally, all Snapdragon devices have the persist partition (as a last resort). Fix #3179