Fix UMS dirty ratio
media_codecs: Readd AAC HW decoder

Don't know if this works, add it back for testing
msm7x30: Add some LPA props

Not sure they work correctly, add them for testing
msm7x30: Support UICC hotswap.

Although this is almost impossible in hardware, the software supports it. It's
currently needed because before radio power on, SIM is reported as absent.