Move JavaContext to couchbase-lite-java
Move JavaContext to couchbase-lite-java

Move JavaContext to couchbase-lite-java so that it can return its JavaSQLiteStorageEngineFactory
and as a result it doesn't need to use the default factory. The SQLiteStorageEngine text file can
be removed as well.

couchbase/couchbase-lite-java-core,gotmyjobs/couchbase-lite-java-core,4u7/couchbase-lite-java-core,mariosotil/couchbase-lite-java-core,Spotme/couchbase-lite-java-core,mariosotil/couchbase-lite-java-core,mariosotil/couchbase-lite-java-core,netsense-sas/couchbase-lite-java-core