Revert "Camera: SoftwareHDR: Reduce mem usage and let exposure time get tuned"

This reverts commit b14bb7e46e518064b98eac77b6f0acf6e57b7fcc.

Conflicts:
	res/values/config.xml
	src/com/android/camera/HdrSoftwareProcessor.java
	src/com/android/camera/HdrSoftwareRS.java
	src/com/android/camera/Util.java
Revert "[1/2] Camera: add software HDR rendering"

This reverts commit bdff6dc4d3ea11b74d2b0d1409c7fd75b94d5f04.

Conflicts:
	res/values/config.xml
	src/com/android/camera/HdrSoftware.rs
	src/com/android/camera/PhotoModule.java
	src/com/android/camera/Util.java