Reorganized cache-control to improve abstraction

Moved "RandomUUIDSQLMappingFunction" from "MappingSupportSQLiteDatabase.kt" to new file "SQLiteCacheControl.kt"
Added extension function "SupportSQLiteOpenHelper.Factory.asCacheControlled" in "SQLiteCacheControl.kt" as wrapper for "asMapped" with "RandomUUIDSQLMappingFunction" as mapping function
Removed "RandomUUIDSQLMappingFunction" as default mapping function from extension function "SupportSQLiteOpenHelper.Factory.asMapped" in "MappingSupportSQLiteDatabase.kt"
Replaced call to "asMapped" with call to "asCacheControlled" in "DatabaseModule"

*This commit is related to issue #529 [1]*

[1] #529

data/src/main/java/org/cryptomator/data/db/DatabaseModule.kt

@@ -8,7 +8,7 @@ import androidx.room.migration.Migration
 import androidx.sqlite.db.SupportSQLiteDatabase
 import androidx.sqlite.db.SupportSQLiteOpenHelper
 import androidx.sqlite.db.framework.FrameworkSQLiteOpenHelperFactory
-import org.cryptomator.data.db.sqlmapping.asMapped
+import org.cryptomator.data.db.SQLiteCacheControl.asCacheControlled
 import org.cryptomator.data.db.migrations.legacy.Upgrade0To1
 import org.cryptomator.data.db.migrations.legacy.Upgrade10To11
 import org.cryptomator.data.db.migrations.legacy.Upgrade11To12
@@ -51,7 +51,7 @@ class DatabaseModule {
 			.createFromInputStream(dbTemplateStreamCallable) //
 			.addMigrations(*migrations) //
 			.addCallback(DatabaseCallback) //
-			.openHelperFactory(DatabaseOpenHelperFactory().asMapped()) //
+			.openHelperFactory(DatabaseOpenHelperFactory().asCacheControlled()) //
 			.setJournalMode(RoomDatabase.JournalMode.TRUNCATE) //
 			.build() //Fails if no migration is found (especially when downgrading)
 			.also { //

data/src/main/java/org/cryptomator/data/db/SQLiteCacheControl.kt

@@ -0,0 +1,21 @@
+package org.cryptomator.data.db
+
+import androidx.sqlite.db.SupportSQLiteOpenHelper
+import org.cryptomator.data.db.sqlmapping.SQLMappingFunction
+import org.cryptomator.data.db.sqlmapping.asMapped
+import java.util.UUID
+
+object SQLiteCacheControl {
+
+	object RandomUUIDSQLMappingFunction : SQLMappingFunction {
+
+		private val newIdentifier: String
+			get() = UUID.randomUUID().toString()
+
+		override fun invoke(sql: String): String {
+			return "$sql -- $newIdentifier"
+		}
+	}
+
+	fun SupportSQLiteOpenHelper.Factory.asCacheControlled(): SupportSQLiteOpenHelper.Factory = asMapped(RandomUUIDSQLMappingFunction)
+}

data/src/main/java/org/cryptomator/data/db/sqlmapping/MappingSupportSQLiteDatabase.kt

@@ -9,7 +9,6 @@ import androidx.sqlite.db.SupportSQLiteOpenHelper
 import androidx.sqlite.db.SupportSQLiteQuery
 import androidx.sqlite.db.SupportSQLiteStatement
 import java.util.Collections
-import java.util.UUID
 
 internal class MappingSupportSQLiteDatabase(
 	private val delegate: SupportSQLiteDatabase,
@@ -185,18 +184,8 @@ private class MappingSupportSQLiteOpenHelperFactory(
 	}
 }
 
-fun SupportSQLiteOpenHelper.Factory.asMapped(mappingFunction: SQLMappingFunction = RandomUUIDSQLMappingFunction): SupportSQLiteOpenHelper.Factory {
+fun SupportSQLiteOpenHelper.Factory.asMapped(mappingFunction: SQLMappingFunction): SupportSQLiteOpenHelper.Factory {
 	return MappingSupportSQLiteOpenHelperFactory(this, mappingFunction)
 }
 
-interface SQLMappingFunction : (String) -> String
-
-object RandomUUIDSQLMappingFunction : SQLMappingFunction {
-
-	private val newIdentifier: String
-		get() = UUID.randomUUID().toString()
-
-	override fun invoke(sql: String): String {
-		return "$sql -- $newIdentifier"
-	}
-}
+interface SQLMappingFunction : (String) -> String