Ensure we do not set seInfoTargetSdkVersion to 0.

We saw a bug where after taking an OTA many packages had a
targetSdkVersion of 0, which was potentially causing lots of crashes.
This prevents that from happening.

Bug: 76021094
Test: Flash older build, flash newer build, ensure targetSdkVersion is
not 0.

Change-Id: If2988a17ca71a6c3c867f905700df864fd09b776