Handle different variants of AndroidRuntime::start()

In Android 5.1.1_r19, Google introduced an additonal parameter for this
method. We need to detect which one the ROM uses and call it.

This assumes that the mangled name is consistent across all ROMs and
that the object instance is implicitely handled as first parameter
to the method. On Android 5.0, we assume that this change is not
merged. If required, the dynamic way could simply be enabled for this
version as well.

Fixes rovo89#71.

Adjust for a change in Xposed's ART variant

Don't use writeByteArray() in xposed_service.cpp

This works around an AOSP bug. Byte arrays first store the array size
and then the bytes. However, Parcel::writeByteArray() uses size_t for
the size, whereas all other parts related to Parcels read/write int32_t
values. This leads to conflicts on 64-bit ROMs, as size_t uses 4 bytes
instead of 4 bytes here. In Xposed, this results in invalid file reads,
most notably in XSharedPreferences.

This fixes rovo89/XposedBridge#58.

Thanks to @rsteckler for reporting this issue and testing the fix!

Support for SDK22

Provide a native method to retrieve the version number

Provide a native method to retrieve the version number

Provide a native method to retrieve the version number

Provide a native method to retrieve the version number

Provide a native method to retrieve the version number

Provide a native method to retrieve the version number