fix: 32bit-ARMv7 crashes on android

[NoelStephensUnity]

This PR resolves the issue with ARMv7 builds crashing on the Android.

fix: #2646

Changelog

• Fixed: Issue where ARMv7 Android builds would crash when trying to validate the batch header.

Testing and Documentation

• Includes integration tests (?)
• No documentation changes or additions were necessary.

[simon-lemay-unity]

Will let you decide if you think it's worth the hit to readability, but you can calculate aligned lengths this way:

alignedLength = (length + 7) & ~7;

It avoids dealing with floating points and only uses fast integer instructions.

[ShadauxCat]

Will let you decide if you think it's worth the hit to readability, but you can calculate aligned lengths this way:

alignedLength = (length + 7) & ~7;

It avoids dealing with floating points and only uses fast integer instructions.

Oh good point. +1 to this @NoelStephensUnity