lowmemorykiller: don't kill com.android.inputmethod.latin

Credits to https://github.com/voku/siyahkernel3
staging/android/Kconfig: LOW_MEMORY_KILLER_AUTODETECT_OOM_ADJ_VALUES

Also fixed the following error:
drivers/staging/android/lowmemorykiller.c:287:43: error: negative width in bit-field '<anonymous>'