Native SQLiteDatabase check read/write database and specific exception messages

[brody4hire]

Added to native SQLiteDatabase.dbopen() & SQLiteDatabase.setLocale() functions (C++)
Needed to help diagnose exceptions in #139 & #161
Extra minor cleanup of includes

Some credit is due to: https://github.com/android/platform_frameworks_base/blob/master/core/jni/android_database_SQLiteConnection.cpp

NOTE: The first time I tested these changes (on my Motorola Moto G), the Multi-threaded read/write test caused a crash with a fatal exception:

E/AndroidRuntime( 6187): FATAL EXCEPTION: Thread-41325
E/AndroidRuntime( 6187): Process: net.zetetic, PID: 6187
E/AndroidRuntime( 6187): net.sqlcipher.database.SQLiteMisuseException: library routine called out of sequence: , while compiling: select count(*) from t1;
E/AndroidRuntime( 6187):    at net.sqlcipher.database.SQLiteCompiledSql.native_compile(Native Method)
E/AndroidRuntime( 6187):    at net.sqlcipher.database.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91)
E/AndroidRuntime( 6187):    at net.sqlcipher.database.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64)
E/AndroidRuntime( 6187):    at net.sqlcipher.database.SQLiteProgram.<init>(SQLiteProgram.java:103)
E/AndroidRuntime( 6187):    at net.sqlcipher.database.SQLiteQuery.<init>(SQLiteQuery.java:49)
E/AndroidRuntime( 6187):    at net.sqlcipher.database.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:42)
E/AndroidRuntime( 6187):    at net.sqlcipher.database.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1447)
E/AndroidRuntime( 6187):    at net.sqlcipher.database.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1416)
E/AndroidRuntime( 6187):    at net.zetetic.tests.MultiThreadReadWriteTest$Reader.getCurrentTableCount(MultiThreadReadWriteTest.java:118)
E/AndroidRuntime( 6187):    at net.zetetic.tests.MultiThreadReadWriteTest$Reader.run(MultiThreadReadWriteTest.java:94)
E/AndroidRuntime( 6187):    at java.lang.Thread.run(Thread.java:818)
W/ActivityManager(  946):   Force finishing activity net.zetetic/.TestSuiteActivity

When I tested again it passed the full test suite. I am suspicious that there is a transient condition that is not directly related to my changes. I will put the log in a comment and then try to investigate this one.

[developernotes]

@brodybits - this is a great change, it should certainly help trace out where potential errors occurred. Thanks!