Add blueprint file for the switcher script

This enables the build system to use the switcher script (switcher4.py)
for builds.

Bug: 128540915
Test: N/A
Change-Id: I7bfe3161bf3da8f19c504fcb7edc08f0cc9e26e7
1 file changed
tree: e528b9b2f5d1f04868ebbd1ed03dc06c2ea7d839
  1. Android.bp
  2. switcher4.py