Resource not found exception coming on launch in android build

I have an xyz android project and some android lib projects linked to it. I am using all these as plugins in my unity project. I have copied the lib projects whole in to Assets/plugins/Android/ folder. Copied res, assets and android manifest of the xyz android project along with the jar(containing src folder and InAppBillingService java file) in to there. When I am making a split binary through Unity and installing on the device, its giving me following error:-

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aquimo.collegebb/com.aquimo.collegebb.UnityPlayerNativeActivity}: android.content.res.Resources$NotFoundException: Resource ID #0x7f030015 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2088) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2113) at android.app.ActivityThread.access$700(ActivityThread.java:139)

PS: in Temp/StagingArea/res/ folder I could not find the layout folder after build was made. Neither the R.java in Temp/StagingArea/gen/ folder contains the ids for layouts missing.