Don't kill apps for OP_REQUEST_INSTALL_PACKAGES on targetSdk < 26.

The app-op wasn't required back then, and granting it shouldn't change
the filesystem view.

Bug: 150819885
Test: atest CtsNoPermissiontestCases25 (still fails, but for a different
reason now).

Change-Id: Id505013233c44ad624d3a4b929bbd3c36ecfd8ce
1 file changed