Changes:
- Image manifest Env now applies in every mode (isolated, minimal) and for termux-type containers (which previously ignored it).
- Android host vars (ANDROID_ROOT, etc.) inherited only in the default mode (Termux, neither isolated nor minimal).
- Always bind /storage + /sdcard unless isolated or minimal mode used.
- Always bind /data/app, /data/dalvik-cache, /data/misc/apexdata/com.android.art/dalvik-cache (Android-system caches) unless isolated or minimal mode used.
Fully-functional termux-docker container requires proot with termux/proot@898b4a8, because this is a prerequisite for using /system/bin/am and similar tools from host /system