Fix build of PrivilegedUpdateApp packages when there's no 2nd arch.

Previously, with TARGET_ARCH := arm64 and TARGET_2ND_ARCH :=, the macro
would return none.

Fix it to always pick the 'arm' apk in this case (it has both arm and arm64 so).

Bug: 72810053
Test: make
Change-Id: I93b865ef78a1fc8e88e7d063e5e2004799a9f400
1 file changed