[SDK-29] termux-telephony-cellinfo does not show anything

[ghost]

Problem description

Looks like access to cell info is completely restricted or requires some special permissions on Android 10+.

Steps to reproduce

1. Build Termux app with target and compile SDK levels of 29.
2. Build Termux:API of target and compile SDK levels of 29.
3. Perform clear installation of both apps on device. If not using Lineage OS, setenforce 0 is needed to fix execve().
4. Install termux-api and run termux-telephony-cellinfo with phone info permission.

Expected behavior
Exceptions should be caught, if API cannot be used on Android 10+, the relevant error should be put into returned JSON value.

Additional information

• Termux application version: latest git
• Android OS version: 10
• Device model: SM-G930FD

Log:

08-09 18:26:48.107 19955 20643 E termux-api: Error in ResultReturner
08-09 18:26:48.107 19955 20643 E termux-api: java.lang.SecurityException: Not allowed to access cell info
08-09 18:26:48.107 19955 20643 E termux-api: 	at android.os.Parcel.createException(Parcel.java:2071)
08-09 18:26:48.107 19955 20643 E termux-api: 	at android.os.Parcel.readException(Parcel.java:2039)
08-09 18:26:48.107 19955 20643 E termux-api: 	at android.os.Parcel.readException(Parcel.java:1987)
08-09 18:26:48.107 19955 20643 E termux-api: 	at com.android.internal.telephony.ITelephony$Stub$Proxy.getAllCellInfo(ITelephony.java:8385)
08-09 18:26:48.107 19955 20643 E termux-api: 	at android.telephony.TelephonyManager.getAllCellInfo(TelephonyManager.java:5293)
08-09 18:26:48.107 19955 20643 E termux-api: 	at com.termux.api.TelephonyAPI$1.writeJson(TelephonyAPI.java:37)
08-09 18:26:48.107 19955 20643 E termux-api: 	at com.termux.api.util.ResultReturner$ResultJsonWriter.writeResult(ResultReturner.java:88)
08-09 18:26:48.107 19955 20643 E termux-api: 	at com.termux.api.util.ResultReturner.lambda$returnData$0(ResultReturner.java:133)
08-09 18:26:48.107 19955 20643 E termux-api: 	at com.termux.api.util.-$$Lambda$ResultReturner$oCU8JqHW5HLMrNZa40ThjAWcwzo.run(Unknown Source:8)
08-09 18:26:48.107 19955 20643 E termux-api: 	at java.lang.Thread.run(Thread.java:919)