For Travis CI - reduce the AVD waiting time to 1 minutes instead.
There is no point to wait for AVD to start. By the time the CI finishes the build, if the emulator is able to start the AVD then it should have been already done so.
On non-CI environment, the build time could still be much faster than the emulator starting the AVD, thus the function to wait for AVD is still useful in non-CI environment.
For Travis CI - switch CI build to use Android build environment.