I created one based of the stats that GSM arena states (http://www.gsmarena.com/samsung_i9300_galaxy_s_iii-4238.php).
So, for a completely stock device, I used the following specs:
- Name: Samsung_Galaxy_S3_IceCream
- Target: Android 4.0 (Api level 14)
- SDCard: 16 Gb
- Skin: WVGA800
- Hardware
- Device Ram Size: 1024 MB
- Hardware Back/Home keys: yes
- Abstracted LDC density: 320
- Keyboard lid support: no
- Max VM application heap size: 48 MiB
- Accelerometer: yes
- Audio Playback support: yes
- Audio recording support: yes
- Battery support: yes
- GPS support: yes
- Orientation support: yes
- Magnetic Field support: yes (I know GSM arena does not state it has one but you can get magnetic iron detection working when using apps such as Smart Tools and it is reported in benchmarking apps like Quadrant).
- Proximity support: yes (Once more, GSM arena does not state it but Quadrant Benchmark reports the existance of CM36651 Proximity Sensor)
- LCD Color depth: 32 (In reality, the S3 has 16M color which is 24 bits)
- LCD Pixel height: 1280
- LCD Pixel width: 720
- SD Card Support: yes
- Touch screen type: multi-touch
- Track-ball support: no
For one with update to JellyBean, all values are the same except as follows:
- Name: Samsung_Galaxy_S3_JellyBean
- Target: Android 4.1 (Api level 15)
When starting the AVD, If you want to scale to the original size, the real screen size is 4.8 inches with a density of 306 px/inch.