Add test for boot image profile collection

Test that the expected properties are set.

Test that saving the system server profile contains both the boot image
profile and system server profile.

The test requires root to run.

Bug: 139883463
Test: atest BootImageProfileTest

(cherry picked from commit f7849d91)

Change-Id: Id7fa4ecc507864c2855da276025be076e5768df1
Merged-In: I6bb39337ba07be58b7dc2b314a8ee92154256f17