Add BootTimeTest separate module

Test: make BootTimeTest && tradefed.sh run commandAndExit
/ssddrive/android/main/platform_testing/tests/automotive/health/boottime/AndroidTest.xml

Bug: 288323866

Change-Id: Ic89ee8852d4b47673f52a79a1086b6725dcf4865
Merged-In: Ic89ee8852d4b47673f52a79a1086b6725dcf4865
(cherry picked from commit 3b3b77f34a22a39df0418d840c1d03adc702e659)
3 files changed