Add e2e test for SdkExtensions

This test verifies the sysprop is bumped as expected
when the apex is installed.

Bug: 137191822
Bug: 143937446
Test: atest sdkextensions_e2e_test
Change-Id: I8e128ac6dee72a7db0f81c1f18ed569d08440891
Merged-In: I8e128ac6dee72a7db0f81c1f18ed569d08440891
(cherry picked from commit a4bc7ecfd713b46658a77b2952ae10ed46906fba)
5 files changed