There is no need to change the design. The highest stack level is the application stack. All of the other stacks are lower layers that provided services to the application.
In addition every program run's it's own JVM deviating from this design would reduce much of the memory management and application protection built into Android.
Here is a review on a tablet that uses the Android OS (link
Android includes a set of core libraries that provides most of the functionality available in the core libraries of the Java programming language.
Every Android application runs in its own process, with its own instance of the Dalvik virtual machine. Dalvik has been written so that a device can run multiple VMs efficiently. The Dalvik VM executes files in the Dalvik Executable (.dex) format which is optimized for minimal memory footprint. The VM is register-based, and runs classes compiled by a Java language compiler that have been transformed into the .dex format by the included "dx" tool.
The Dalvik VM relies on the Linux kernel for underlying functionality such as threading and low-level memory management.