Use LauncherActivity name from Nougat.

So launcher doesn't disappear on upgrade.

Bug: 62836700
Test: Build install test with different names.
Change-Id: I53e93e6d84f6c289d10b46f5a32b74f56453169c
(cherry picked from commit e2b5ffee1b2863a19ec8f9eb2c48bd81a2dcf7a4)
1 file changed