Overlay builds fine but doesn't apply - Lenovo Tab M8

[eric-pierce]

I'm running into some interesting challenges while trying to build an overlay for my Lenovo Tab M8:

1. The latest firmware for my device (Android 10) contains both /system/product/overlay/framework-res__auto_generated_rro_product.apk and /system/framework/framework-res.apk. It looks like the auto_generated version has fewer config.xml settings (100 lines across all 4 XML files) vs the framework-res file (~650 lines across all 4 XML files). I'm not sure which to use, for now I'm using the auto_generated_rro file.

2. I'm able to pass all tests and build the overlay, but when I upload to my device and restart, I find the following error in logcat:

08-15 12:57:33.346 4025 4025 W PackageManager: Failed to parse /system/product/overlay/treble-overlay-lenovo-tabm8.apk: /system/product/overlay/treble-overlay-lenovo-tabm8.apk (at Binary XML file line #10): does not contain an or

Any help would be appreciated. I'm trying to get the device to recognize my headphones when they're plugged in. I haven't had any success with "adb shell setprop persist.sys.overlay.devinputjack true" or the settings suggested in https://github.com/phhusson/treble_experimentations/wiki/Common-Issues-and-fixes.

I've also tried using "Lesser AudioSwitch" to solve my headphone problem but it doesn't support Android 11.

Any help/pointing me in the right direction would be greatly appreciated!