Split api libs into OpenKeychain specific and OpenPGP Provider lib

libraries/keychain-api-library/build.gradle

@@ -1,35 +0,0 @@
-// please leave this here, so this library builds on its own
-buildscript {
-    repositories {
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:0.8.3'
-    }
-}
-
-apply plugin: 'android-library'
-
-android {
-    compileSdkVersion 19
-    buildToolsVersion '19.0.3'
-    
-    // NOTE: We are using the old folder structure to also support Eclipse
-    sourceSets {
-        main {
-            manifest.srcFile 'AndroidManifest.xml'
-            java.srcDirs = ['src']
-            resources.srcDirs = ['src']
-            aidl.srcDirs = ['src']
-            renderscript.srcDirs = ['src']
-            res.srcDirs = ['res']
-            assets.srcDirs = ['assets']
-        }
-    }
-    
-    // Do not abort build if lint finds errors
-    lintOptions {
-        abortOnError false
-    }
-}