added f-droid metadata

fdroid/repo/com.tutpro.baresip/en-US/changelogs/3.2.0.txt

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+- Added dialpad button for choosing between phone number and text soft keyboard.
+- Fixed auto completion of callee based on contacts.

fdroid/repo/com.tutpro.baresip/en-US/full_description.txt

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+Currently baresip app supports SIP voice calls and messages with TLS
+transport, voicemail Message Waiting Indication (MWI), incoming call
+transfers via REFER method, PCMU/PCMA and opus voice codecs, as well as
+ZRTP and (DTLS) SRTP media encapsulation.  Development of baresip app is
+motivated by need for a secure open source SIP User Agent for Android
+that does not depend on proprietary, third party push notification
+services.

fdroid/repo/com.tutpro.baresip/en-US/short_description.txt

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+SIP User Agent app for Android based on baresip
+(https://github.com/alfredh/baresip) library.

fdroid/repo/com.tutpro.baresip/en-US/title.txt

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+baresip