Telephony: Close the FileReader when finished

Change-Id: I12865e8d974515d4f349d476bcf775e015008e16
Merge branch 'cm' into HEAD

Steps on this https://github.com/VanirAOSP/frameworks_opt_telephony/commit/d01fa373520d358d89cc1dc7c3f4b87fa0dd264f

Conflicts:
	src/java/com/android/internal/telephony/uicc/SpnOverride.java

Change-Id: I66ec3c5064ac97341b60960bde5a00abc4d21037