remove #if guards in SkAndroidCodec.cpp
remove #if guards in SkAndroidCodec.cpp

I'm not sure I entirely understand what's going on here, but it looks
like these removed guards aren't needed?  Can you walk me through what
they're for?  I think they're getting in the way of runtime registered
codecs working with SkAndroidCodec.

Change-Id: I078bfb77797b4a3419f02a20d77d0aa8d7bce09d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/213876
Commit-Queue: Mike Klein <14574f09dfa9b4e14759b88c3426a495a0e627b0@google.com>
Reviewed-by: Leon Scroggins <995cad867ca30d6399abe011583a53547c8afea1@google.com>

aosp-mirror/platform_external_skia,HalCanary/skia-hc,google/skia,HalCanary/skia-hc,google/skia,google/skia,aosp-mirror/platform_external_skia,google/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,HalCanary/skia-hc,HalCanary/skia-hc,google/skia,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,HalCanary/skia-hc,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia