android/benchmark: Add cpuidle to default modules
android/benchmark: Add cpuidle to default modules

cpuidle is useful to include, add it to the defaults in
the benchmark conf.

Signed-off-by: Joel Fernandes <89f39a38232ac523c7644e47b6ca6563177e40b4@google.com>

mdigiorgio/lisa,credp/lisa,ARM-software/lisa,arnoldlu/lisa,ARM-software/lisa,bjackman/lisa,ARM-software/lisa,credp/lisa,mdigiorgio/lisa,ARM-software/lisa,arnoldlu/lisa,credp/lisa,credp/lisa,bjackman/lisa