core: Add back mistakenly removed string

Change-Id: Ia56f05ebf87f16b9304fe8fa0664874fcc03697c
Automatic translation import

Change-Id: Ie45913a911cf7877a128c3138c347ef31009c91e
Core: Improve AOSP JA translation

They translated "hotspot" as "アクセスポイント"(access point) but it just gets us confused.
"テザリング"(Tethering) is preferred than "アクセスポイント"(access point) in Japanese translation.
FYI, most vendors fixed these strings e.g. Samsung and Sony.

Change-Id: Ic13ec6d33f411b026d90312600d0150bc3a759b0
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_frameworks_base into android-4.4