Replace SLOG() with LOG(ERROR)

This commit replaces SLOG() from cutils/log.h with LOG(ERROR) from
android-base/logging.h.

This commit is a partial cherry-pick of
3472e52fc259b6a549acece21d4901d99d6a421f.

Test: mma  # it builds
Change-Id: I36bc4a4430fc16b2c1c2eb39a2ec4d888c1ae352
Merged-In: I70dc512f21459d1e25b187f24289002b2c7bc7af
2 files changed