Calculate cellular radio value from modem.controller values.

Recently cellular radio related values {"radio.active", "radio.scanning",
"radio.on"} are removed from power_profile.xml, which causes inaccurate
radio power usage. We use following formula to calculate radio
values from modem.controller values.

radio.active = average of modem.controller.rx and modem.controller.tx values
radio.scanning = 0 (since this is already included in radio.on bin 0)
<array name="radio.on"> <!-- Strength 0 to BINS-1 -->
    <value>modem.controller.idle * 25 / 180 </value>   <!-- none -->
    <value>max(1, modem.controller.idle/256) </value>  <!-- poor -->
    <value>max(1, modem.controller.idle/256) </value>  <!-- moderate -->
    <value>max(1, modem.controller.idle/256) </value>  <!-- good -->
    <value>max(1, modem.controller.idle/256) </value>  <!-- great -->
 </array>

Bug: 79379255
Test:  use debugger to observe correct mPowerRadioOn, mPowerBins,
mPowerScan are calculated. "adb shell dumpsys batterystats", looking for
"radio=" in "Estimated power use" section.

Change-Id: Ic65a5c8a35a5b1f4ba05ddc150e29b00bc62689f