[Feature] Bump version to 1.0.0-beta.9.

Author: zhanghai

app/build.gradle

@@ -14,8 +14,8 @@ android {
         applicationId 'me.zhanghai.android.files'
         minSdkVersion 21
         targetSdkVersion 28
-        versionCode 9
-        versionName '1.0.0-beta.8'
+        versionCode 10
+        versionName '1.0.0-beta.9'
         resValue 'string', 'app_version', versionName + ' (' + versionCode + ')'
         buildConfigField 'String', 'FILE_PROVIDIER_AUTHORITY', 'APPLICATION_ID + ".file_provider"'
         resValue 'string', 'file_provider_authority', applicationId + '.file_provider'