Use different manifest for rebootless shim APEX

This reduces a chance that new prebuilt drop will break existing CTS
tests that are using regular v2 shim APEX.

Bug: 188062003
Bug: 191262663
Test: m com.android.apex.cts.shim.v2
Test: m com.android.apex.cts.shim.v2_rebootless
Change-Id: I82014bc71da1b2ae2a47ac7b9c852c4cfaa36321
Merged-In: I82014bc71da1b2ae2a47ac7b9c852c4cfaa36321
(cherry picked from commit b09181e0660a8a7e0bfc96d513de8d184add2051)
3 files changed