fold README.Android into android/README

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-Android-specific notes
-
-Note that this document has not necessarily been updated to match
-reality...
-
-For instructions on how to build for Android, see README.cross.
-
-* Getting something running on an emulated device
-
-	Create an AVD in the android UI, don't even try to get
-the data partition size right in the GUI, that is doomed to producing
-an AVD that doesn't work. Instead start it from the console:
-
-	LD_LIBRARY_PATH=$(pwd)/lib emulator-arm -avd <Name> -partition-size 500
-
-In order to have proper acceleration, you need the 32-bit libGL.so:
-
-        sudo zypper in Mesa-libGL-devel-32bit
-
-	Where <Name> is the literal name of the AVD that you entered.
-
-	Then:
-
-	cd android/experimental/LOAndroid3
-	ant debug install
-	adb logcat
-
-	And if all goes well - you should have some nice debug output to enjoy
-when you start the app. After a while of this loop you might find that you have
-lost a lot of space on your emulator's or device's /data volume. If using the
-emulator, you can do:
-
-	adb shell stop; adb shell start
-
-but on a (non-rooted) device you probably just need to reboot it. On the other
-hand, this phenomenon might not happen on actual devices.
-
-* What about using a real device?
-
-	That works fine, too.
-
-* Debugging
-
-	First of all, you need to configure the build with --enable-debug or
---enable-dbgutil.  You may want to provide --enable-selective-debuginfo too,
-like --enable-selective-debuginfo="sw/" or so, in order to fit into the memory
-during linking.
-
-	Building with all symbols is also possible but the linking is currently
-slow (around 10 to 15 minutes) and you need lots of memory (around 16GB + some
-swap).
-
-	You also want to avoid --with-android-package-name (or when you use
-that, you must set it to "org.libreoffice"), otherwise ndk-gdb will complain
-that
-
-ERROR: Could not extract package's data directory. Are you sure that
-       your installed application is debuggable?
-
-	When you have all this, install the .apk to the device, and:
-
-	cd android/experimental/LOAndroid3
-	<android-ndk-r10d>/ndk-gdb --adb=<android-sdk-linux>/platform-tools/adb --start
-
-	Pretty printers aren't loaded automatically due to the single shared
-	object, but you can still load them manually. E.g. to have a pretty-printer for
-	rtl::OString, you need:
-
-	(gdb) python sys.path.insert(0, "/master/solenv/gdb")
-	(gdb) source /master/instdir/program/libuno_sal.so.3-gdb.py
-
-* Common Errors / Gotchas
-
-lo_dlneeds: Could not read ELF header of /data/data/org.libreoffice...libfoo.so
-	This (most likely) means that the install quietly failed, and that
-the file is truncated; check it out with adb shell ls -l /data/data/....
-
-
-* Detailed explanation
-
-Note: the below talk about unit tests is obsolete; we no longer have
-any makefilery etc to build unit tests for Android.
-
-Unit tests are the first thing we want to run on Android, to get some
-idea how well, if at all, the basic LO libraries work. We want to
-build even unit tests as normal Android apps, i.e. packaged as .apk
-files, so that they run in a sandboxed environment like that of
-whatever eventual end-user Android apps there will be that use LO
-code.
-
-Sure, we could quite easily build unit tests as plain Linux
-executables (built against the Android libraries, of course, not
-GNU/Linux ones), push them to the device or emulator with adb and run
-them from adb shell, but that would not be a good test as the
-environment such processs run in is completely different from that in
-which real end-user apps with GUI etc run. We have no intent to
-require LibreOffice code to be used only on "rooted" devices etc.
-
-All Android apps are basically Java programs. They run "in" a Dalvik
-virtual machine. Yes, you can also have apps where all *your* code is
-native code, written in a compiled language like C or C++. But also
-also such apps are actually started by system-provided Java
-bootstrapping code (NativeActivity) running in a Dalvik VM.
-
-Such a native app (or actually, "activity") is not built as a
-executable program, but as a shared object. The Java NativeActivity
-bootstrapper loads that shared object with dlopen.
-
-Anyway, our current "experimental" apps (DocumentLoader,
-LibreOffice4Android and LibreOfficeDesktop) are not based on
-NativeActivity any more. They have normal Java code for the activity,
-and just call out to a single, app-specific native library (called
-liblo-native-code.so) to do all the heavy lifting.