Revert "libbinder_ndk: toString never goes to empty strings."

Revert "update toString checks"

Revert submission 2320002-toString-part-i

Reason for revert: b/260651168
Reverted Changes:
I7c8ea833e:libbinder_ndk: toString never goes to empty string...
Ia3a5fde74:update toString checks

Change-Id: If8145790fb39be4f99e7348895da4f59ce05a4bb
1 file changed