Improve Xiaomi attribute report parsing

[puddly]

Xiaomi attribute reports apparently can contain off-by-one length errors in the other direction too (#881):

# Attribute ID
01ff

# Data type
42

# Length
44

# Value (really 69 bytes, expected 0x44 = 68)
03282305212e0008212e12092100106410006510006e20006f2000942002953
90a078c41963999eb0c4597390030683b983980bb873c9b2100009c20010a21
00000c280000

They usually look like:

# Attribute ID
01ff

# Data type
42

# Length
1f

# Value (really 30 bytes, expected 0x1f = 31)
0121b30b0328150421a8130521660106240100000000082105140a21a2f9

Or are the correct length.

In all of these cases the attribute report needs to be postprocessed, since the data type is incorrect and this leads to binary data being written to log files (home-assistant/core#24668):

[0xe4b2:1:0x0000] ZCL request 0x000a: [[<Attribute attrid=65281 value=<TypeValue type=CharacterString, value=d�>>]]
[0xe4b2:1:0x0000] Attribute report received: 65281=d�
0x8dbb:1:0x0b04 async_update
[0x8dbb:1:0x0000] ZCL request 0x000a: [[<Attribute attrid=65281 value=<TypeValue type=CharacterString, value=�(#�!�>>]]
[0x8dbb:1:0x0000] Attribute report received: 65281=�(#�!�

I've changed the data type from "Character String" (0x42) to "Octet String" (0x41) to fix this.

[coveralls]

Pull Request Test Coverage Report for Build 1167290720

• 40 of 45 (88.89%) changed or added relevant lines in 1 file are covered.
• 89 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.3%) to 82.858%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
zhaquirks/xiaomi/init.py	40	45	88.89%

Files with Coverage Reduction	New Missed Lines	%
zhaquirks/tuya/ts130f.py	4	77.5%
zhaquirks/tuya/init.py	85	72.43%

Totals
Change from base Build 1024783287:	0.3%
Covered Lines:	4041
Relevant Lines:	4877

---

💛 - Coveralls

[codecov-commenter]

Codecov Report

Merging #883 (3a4fe1d) into dev (833c1b9) will increase coverage by 0.35%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##              dev     #883      +/-   ##
==========================================
+ Coverage   82.50%   82.85%   +0.35%     
==========================================
  Files         185      194       +9     
  Lines        4589     4877     +288     
==========================================
+ Hits         3786     4041     +255     
- Misses        803      836      +33     

Impacted Files	Coverage Δ
zhaquirks/xiaomi/__init__.py	83.94% <88.88%> (+2.06%)	⬆️
zhaquirks/xiaomi/mija/sensor_switch.py	58.69% <0.00%> (-12.28%)	⬇️
zhaquirks/const.py	100.00% <0.00%> (ø)
zhaquirks/lidl/cct.py	100.00% <0.00%> (ø)
zhaquirks/tuya/valve.py	95.52% <0.00%> (ø)
zhaquirks/tuya/ts0041.py	100.00% <0.00%> (ø)
zhaquirks/tuya/ts0601.py	100.00% <0.00%> (ø)
zhaquirks/legrand/dimmer.py	100.00% <0.00%> (ø)
zhaquirks/philips/rwlfirstgen.py	100.00% <0.00%> (ø)
zhaquirks/tuya/thermostat_88teujp.py	53.94% <0.00%> (ø)
... and 14 more

---

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[dmulcahey]

@puddly hows this one goin?

[puddly]

Lemme look over it again.